Crystal structure of 2-(4-acetyl­anilino)-2-oxoethyl 3-(4-hy­droxy­phen­yl)propionate

Ashraf, Z.; Kim, D.; Seo, S.-Y.; Kang, S.K.

doi:10.1107/S205698901600894X

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ISSN: 2056-9890

Volume 72| Part 7| July 2016| Pages 933-936

https://doi.org/10.1107/S205698901600894X

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Crystal structure of 2-(4-acetylanilino)-2-oxoethyl 3-(4-hydroxyphenyl)propionate

Zaman Ashraf,^a,^b Daeyoung Kim,^c Sung-Yum Seo ^a and Sung Kwon Kang ^c ^*

^aDepartment of Biology, College of Natural Sciences, Kongju National University, Gongju 314-701, Republic of Korea, ^bDepartment of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan, and ^cDepartment of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea
^*Correspondence e-mail: skkang@cnu.ac.kr

Edited by H. Ishida, Okayama University, Japan (Received 5 May 2016; accepted 3 June 2016; online 10 June 2016)

In the title compound, C₁₉H₁₉NO₅, the amide carbonyl O atom is positioned anti to the other two carbonyl O atoms. The 4-hydroxyhydrocinnamate fragment is disordered over two positions with an occupancy ratio of 0.729 (12):0.271 (12). The N—(C=O)—C plane of the acetamide group and the acetate O—(C=O)—C plane are almost co-planar; the acetamide plane makes dihedral angles of 1.9 (6) and 16.0 (19)°, respectively, with the acetate planes of the major and minor occupancy components. In the crystal, N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds link the molecules into a supramolecular sheet structure parallel to (102).

Keywords: crystal structure; cinnamate ester; N—H⋯O and O—H⋯O hydrogen bonds; tyrosinase inhibitor.

CCDC reference: 1483293

1. Chemical context

Hydroxy-substituted aromatic compounds with additional ester and amide functionalities have been reported to be potential tyrosinase inhibitors (Miliovsky et al., 2013 ; Takahashi & Miyazawa, 2011 ). Tyrosinase is a key enzyme present in melanocytes, which is involved in the biosynthesis of melanin. The abnormal production and accumulation of melanin causes a number of hyperpigmentation disorders such as freckles, melasma, lentigo senilis and pigmented acne scars (Lynde et al., 2006 ; Cullen, 1998 ). Tyrosinase has also been linked to melanoma, a skin-cancer type that arises from the aberrant proliferation of melanocytes (Uong & Zon, 2010 ). It has also been reported that tyrosinase is one of the main causes of most fruit and vegetable damage during post-harvest handling and processing, leading to quicker degradation and shorter shelf life (Yi et al., 2010 ). Therefore, the synthesis of safe and effective tyrosinase inhibitors is of great concern in the medical, agricultural and cosmetic industries. The synthesis and tyrosinase inhibitory activity of hydroxy-substituted phenyl esters is currently an ongoing research topic in our lab (Ashraf et al., 2015 ). In view of the tyrosinase inhibitory potential of hydroxy-substituted aromatic compounds, the title compound (Fig. 1) has been synthesized and characterized by single crystal X-ray diffraction.

Figure 1
The molecular structure of the title compound, showing the atom-numbering scheme and 30% probability ellipsoids. Only the major occupancy disorder component is shown.

2. Structural commentary

The fragment O1/O12/N10/C2–C9/C11/C13 including the acetamide group is almost planar with an r.m.s. deviation of 0.034 (11) Å. The 4-hydroxyhydrocinnamate fragment is disordered over two positions with occupancy ratio of 0.729 (12):0.271 (12). The acetamide plane O12/N10/C11/C12 makes dihedral angles of 1.9 (6) and 16.0 (19)°, respectively, with the disordered acetate planes O14/O16/C15/C17 and O14A/O16A/C15A/C17A. The carbonyl O1 and O16 atoms are positioned anti with respect to the carbonyl O12 atom. These C=O bond lengths are in the range 1.176 (12)–1.226 (6) Å.

3. Supramolecular features

In the crystal, molecules are linked via N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds (N10—H10⋯O1ⁱ, O25—H25⋯O12ⁱⁱ, C4—H4A⋯O16ⁱⁱⁱ and C24—H24⋯O12ⁱⁱ; Table 1), forming a sheet parallel to (102) (Fig. 2). In the sheet, these hydrogen bonds form R₂¹(6), R₃³(19) and R₃³(31) graph-set motifs. There are also weak C—H⋯O hydrogen bonds (C13—H13B⋯O25^iv and C13—H13B⋯O25A^iv; Table 1) between the sheets (Fig. 3).

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N10—H10⋯O1ⁱ	0.86 (5)	2.11 (5)	2.925 (5)	159 (4)
O25—H25⋯O12ⁱⁱ	0.95 (12)	1.93 (11)	2.87 (3)	172 (13)
C4—H4A⋯O16ⁱⁱⁱ	0.96	2.59	3.416 (10)	144
C13—H13B⋯O25^iv	0.97	2.60	3.458 (17)	147
C13—H13B⋯O25A^iv	0.97	2.50	3.34 (4)	145
C24—H24⋯O12ⁱⁱ	0.93	2.57	3.284 (11)	133
Symmetry codes: (i) $[-x+2, y-{\script{1\over 2}}, -z]$ ; (ii) $[-x, y-{\script{1\over 2}}, -z+1]$ ; (iii) x, y+1, z; (iv) $[-x+1, y+{\script{1\over 2}}, -z+1]$ .

Figure 2
The sheet structure of molecules linked by N—H⋯O, O—H⋯O, and C—H⋯O hydrogen bonds (dashed lines). Only the major occupancy disorder components are shown.

Figure 3
Part of the packing diagram of the title compound, showing the C—H⋯O hydrogen bonds (dashed lines) between the hydrogen-bonded sheets. Only the major disorder components are shown.

4. Database survey

A search of the Cambridge Structural Database (Version 5.37 with two updates, Groom et al., 2016 ) returned three entries for crystal structures with ethyl hydrocinnamate as the main skeleton (BESTIC: Böjthe-Horváth et al., 1982 ; FUZYOQ: Wang et al., 2015 ; NAXVIR: Hassan & Wang, 1997 ). There are 76 entries of organic compounds with the 4-acetylanilino group.

5. Synthesis and crystallization

The title compound was synthesized by direct condensation of 4-hydroxyphenyl propanoic acid with N-(4-acetylphenyl)-2-chloroacetamide in the presence of dimethyl formamide (DMF) solvent and triethylamine base (Fig. 4). The reaction mixture was stirred overnight at room temperature. Then the mixture was poured into finely crushed ice and extracted with ethyl acetate. It was washed with 5% HCl and 5% sodium hydroxide, and finally with aqueous NaCl solution. The organic layer was dried over anhydrous magnesium sulfate, filtered and the solvent was removed under reduced pressure to afford the crude product. The title compound was purified by silica gel column chromatography using ethyl acetate and n-hexane (3:1) as eluent. The single crystals were obtained from a solvent mixture of ethyl acetate/n-hexane (3:1) upon slow evaporation at room temperature (yield 78%, m.p. 419–421 K). FTIR ν_max cm⁻¹: 3428 (N—H), 3354 (O—H), 2971 (sp² C—H), 2887 (sp³ C—H), 1735 (C=O ester), 1646 (C=O amide), 1601 (C=C aromatic), 1154 (C—O, ester).

Figure 4
Reaction scheme for the synthesis of the title compound.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2. The 4-hydroxyhydrocinnamate fragment, O16/O25/C15–C24, was found to be disordered over two positions and the occupancy ratio was refined to 0.729 (12):0.271 (12). Atoms O16A, O25A and C15A–C24A of the minor component were refined isotropically. Planarity restraints were applied for atoms C18–C24, O25, C18A–C24A and O25A. Bond-distance restraints were also applied for C20, C22, C23, O16A and C15A–C24A. H10 and H25 of the NH and OH groups, respectively, were located in a difference Fourier map and the coordinates were refined with U_iso(H) = 1.2U_eq(N) and 1.5U_eq(O) [N—H = 0.86 (5) Å and O—H = 0.95 (12) Å]. H25A of the minor occupancy OH group was refined with a restraint of O—H = 0.90 (2) Å, and with U_iso(H) = 1.5U_eq(O). All other H atoms were included as riding atoms, with C—H = 0.93–0.97 Å and with U_iso(H) = 1.5U_eq(C) for methyl H atoms or 1.2U_eq(C) otherwise.

Table 2
Experimental details

Crystal data
Chemical formula	C₁₉H₁₉NO₅
M_r	341.35
Crystal system, space group	Monoclinic, P2₁
Temperature (K)	296
a, b, c (Å)	5.510 (3), 14.809 (9), 10.824 (7)
β (°)	100.757 (7)
V (Å³)	867.7 (9)
Z	2
Radiation type	Mo Kα
μ (mm⁻¹)	0.10
Crystal size (mm)	0.26 × 0.25 × 0.23

Data collection
Diffractometer	Bruker SMART CCD area-detector
No. of measured, independent and observed [I > 2σ(I)] reflections	6909, 3403, 1798
R_int	0.031
(sin θ/λ)_max (Å⁻¹)	0.627

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.053, 0.126, 1.00
No. of reflections	3403
No. of parameters	276
No. of restraints	25
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.14, −0.17
Computer programs: SMART and SAINT (Bruker, 2012 ), SHELXS2013 (Sheldrick, 2008 ), SHELXL2013 (Sheldrick, 2015 ), ORTEP-3 for Windows (Farrugia, 2012 ) and publCIF (Westrip,2010 ).

Supporting information

CCDC reference: 1483293

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S205698901600894X/is5453sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S205698901600894X/is5453Isup2.hkl

Supporting information file. DOI: https://doi.org/10.1107/S205698901600894X/is5453Isup3.cml

checkCIF report

Computing details top

Data collection: SMART (Bruker, 2012); cell refinement: SAINT (Bruker, 2012); data reduction: SAINT (Bruker, 2012); program(s) used to solve structure: SHELXS2013 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: publCIF (Westrip,2010).

2-(4-Acetylanilino)-2-oxoethyl 3-(4-hydroxyphenyl)propionate top

Crystal data top

C₁₉H₁₉NO₅	F(000) = 360
M_r = 341.35	D_x = 1.306 Mg m⁻³
Monoclinic, P2₁	Mo Kα radiation, λ = 0.71073 Å
a = 5.510 (3) Å	Cell parameters from 1529 reflections
b = 14.809 (9) Å	θ = 2.4–20.5°
c = 10.824 (7) Å	µ = 0.10 mm⁻¹
β = 100.757 (7)°	T = 296 K
V = 867.7 (9) Å³	Block, colourless
Z = 2	0.26 × 0.25 × 0.23 mm

Data collection top

Bruker SMART CCD area-detector diffractometer	R_int = 0.031
Radiation source: fine-focus sealed tube	θ_max = 26.5°, θ_min = 1.9°
φ and ω scans	h = −6→6
6909 measured reflections	k = −18→18
3403 independent reflections	l = −13→13
1798 reflections with I > 2σ(I)

Refinement top

Refinement on F²	25 restraints
Least-squares matrix: full	Hydrogen site location: mixed
R[F² > 2σ(F²)] = 0.053	H atoms treated by a mixture of independent and constrained refinement
wR(F²) = 0.126	w = 1/[σ²(F_o²) + (0.0507P)² + 0.0787P] where P = (F_o² + 2F_c²)/3
S = 1.00	(Δ/σ)_max < 0.001
3403 reflections	Δρ_max = 0.14 e Å⁻³
276 parameters	Δρ_min = −0.17 e Å⁻³

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
O1	1.0367 (8)	1.4286 (2)	0.0585 (4)	0.0831 (15)
C2	0.8795 (10)	1.3999 (4)	0.1151 (5)	0.0551 (15)
C3	0.8377 (10)	1.3024 (3)	0.1253 (5)	0.0451 (14)
C4	0.7281 (11)	1.4662 (3)	0.1753 (6)	0.0689 (18)
H4A	0.7711	1.5267	0.1559	0.103*
H4B	0.7615	1.4578	0.2648	0.103*
H4C	0.5557	1.4562	0.1434	0.103*
C5	0.9784 (9)	1.2426 (4)	0.0675 (5)	0.0555 (16)
H5	1.0986	1.2651	0.0258	0.067*
C6	0.9408 (10)	1.1512 (3)	0.0717 (5)	0.0523 (15)
H6	1.0375	1.1123	0.0339	0.063*
C7	0.7613 (9)	1.1162 (3)	0.1315 (5)	0.0459 (14)
C8	0.6218 (11)	1.1739 (3)	0.1902 (5)	0.0572 (17)
H8	0.5016	1.1509	0.2315	0.069*
C9	0.6618 (9)	1.2656 (3)	0.1872 (5)	0.0540 (16)
H9	0.5684	1.3039	0.2278	0.065*
N10	0.7347 (8)	1.0214 (3)	0.1292 (4)	0.0511 (13)
H10	0.836 (9)	0.995 (4)	0.089 (4)	0.061*
C11	0.5765 (10)	0.9683 (4)	0.1782 (5)	0.0500 (15)
O12	0.4168 (7)	0.9955 (2)	0.2321 (4)	0.0621 (11)
C13	0.6264 (11)	0.8699 (3)	0.1599 (5)	0.0509 (15)
H13A	0.6134	0.8570	0.0710	0.061*
H13B	0.7923	0.8548	0.2024	0.061*
O14	0.4514 (7)	0.8175 (2)	0.2098 (4)	0.0650 (12)
C15	0.4672 (17)	0.7263 (6)	0.1902 (11)	0.044 (3)	0.729 (12)
O16	0.631 (3)	0.6938 (5)	0.1497 (16)	0.074 (4)	0.729 (12)
C17	0.2874 (14)	0.6724 (5)	0.2509 (9)	0.048 (2)	0.729 (12)
H17A	0.2446	0.6169	0.2042	0.058*	0.729 (12)
H17B	0.1372	0.7070	0.2487	0.058*	0.729 (12)
C18	0.4021 (15)	0.6501 (7)	0.3868 (8)	0.070 (3)	0.729 (12)
H18A	0.5659	0.6254	0.3893	0.084*	0.729 (12)
H18B	0.4200	0.7054	0.4356	0.084*	0.729 (12)
C19	0.2509 (13)	0.5829 (7)	0.4479 (7)	0.063 (3)	0.729 (12)
C20	0.2881 (15)	0.4932 (7)	0.4377 (8)	0.065 (3)	0.729 (12)
H20	0.4061	0.4732	0.3928	0.078*	0.729 (12)
C21	0.0769 (17)	0.6103 (8)	0.5129 (10)	0.063 (3)	0.729 (12)
H21	0.0479	0.6717	0.5202	0.076*	0.729 (12)
C22	0.154 (2)	0.4300 (8)	0.4927 (10)	0.085 (3)	0.729 (12)
H22	0.1837	0.3686	0.4852	0.102*	0.729 (12)
C23	−0.024 (2)	0.4599 (14)	0.5590 (11)	0.065 (6)	0.729 (12)
C24	−0.059 (2)	0.5493 (11)	0.5684 (12)	0.060 (4)	0.729 (12)
H24	−0.1759	0.5704	0.6130	0.072*	0.729 (12)
O25	−0.156 (4)	0.389 (2)	0.6129 (17)	0.079 (6)	0.729 (12)
H25	−0.24 (2)	0.420 (8)	0.669 (14)	0.119*	0.729 (12)
C15A	0.526 (5)	0.7305 (17)	0.239 (2)	0.033 (7)*	0.271 (12)
O16A	0.647 (11)	0.698 (3)	0.164 (6)	0.13 (2)*	0.271 (12)
C17A	0.344 (5)	0.6930 (19)	0.317 (3)	0.055 (8)*	0.271 (12)
H17C	0.3841	0.7156	0.4029	0.066*	0.271 (12)
H17D	0.1770	0.7116	0.2813	0.066*	0.271 (12)
C18A	0.363 (4)	0.5920 (18)	0.317 (2)	0.075 (8)*	0.271 (12)
H18C	0.5348	0.5749	0.3420	0.090*	0.271 (12)
H18D	0.3055	0.5702	0.2321	0.090*	0.271 (12)
C19A	0.215 (3)	0.5467 (15)	0.4037 (16)	0.044 (7)*	0.271 (12)
C20A	0.256 (4)	0.4531 (14)	0.412 (2)	0.045*	0.271 (12)
H20A	0.3644	0.4259	0.3672	0.054*	0.271 (12)
C21A	0.054 (5)	0.5854 (17)	0.471 (2)	0.050 (9)*	0.271 (12)
H21A	0.0273	0.6474	0.4649	0.060*	0.271 (12)
C22A	0.135 (5)	0.4023 (14)	0.487 (2)	0.042*	0.271 (12)
H22A	0.1609	0.3403	0.4942	0.050*	0.271 (12)
C23A	−0.024 (5)	0.444 (3)	0.553 (2)	0.037 (12)*	0.271 (12)
C24A	−0.071 (6)	0.535 (2)	0.548 (3)	0.071 (18)*	0.271 (12)
H24A	−0.1794	0.5619	0.5932	0.085*	0.271 (12)
O25A	−0.135 (10)	0.397 (6)	0.622 (5)	0.061 (13)*	0.271 (12)
H25A	−0.18 (5)	0.439 (15)	0.67 (3)	0.091*	0.271 (12)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
O1	0.110 (3)	0.049 (2)	0.112 (4)	−0.013 (2)	0.075 (3)	0.007 (2)
C2	0.060 (4)	0.049 (3)	0.063 (4)	0.004 (3)	0.027 (3)	0.003 (3)
C3	0.057 (4)	0.034 (3)	0.048 (4)	0.000 (2)	0.018 (3)	0.007 (2)
C4	0.080 (4)	0.040 (3)	0.097 (5)	−0.001 (3)	0.040 (4)	0.002 (3)
C5	0.054 (4)	0.052 (4)	0.070 (4)	0.000 (3)	0.034 (3)	0.005 (3)
C6	0.063 (4)	0.035 (3)	0.069 (4)	0.009 (3)	0.039 (3)	0.002 (3)
C7	0.052 (3)	0.037 (3)	0.056 (4)	0.001 (3)	0.030 (3)	0.002 (2)
C8	0.070 (4)	0.035 (3)	0.079 (4)	−0.003 (3)	0.047 (3)	0.001 (3)
C9	0.059 (4)	0.038 (3)	0.076 (4)	0.004 (3)	0.043 (3)	0.001 (3)
N10	0.069 (3)	0.030 (2)	0.067 (3)	0.003 (2)	0.046 (3)	−0.001 (2)
C11	0.052 (3)	0.044 (3)	0.058 (4)	−0.003 (3)	0.021 (3)	0.001 (3)
O12	0.073 (3)	0.040 (2)	0.088 (3)	0.0043 (18)	0.054 (2)	0.0006 (19)
C13	0.061 (4)	0.037 (3)	0.063 (4)	−0.001 (3)	0.033 (3)	0.000 (2)
O14	0.074 (3)	0.040 (2)	0.098 (3)	−0.0014 (18)	0.058 (2)	0.0079 (19)
C15	0.044 (6)	0.046 (6)	0.038 (6)	−0.011 (4)	−0.004 (5)	0.017 (5)
O16	0.076 (6)	0.022 (3)	0.148 (10)	0.006 (3)	0.081 (6)	0.012 (3)
C17	0.046 (5)	0.045 (5)	0.053 (6)	−0.006 (4)	0.008 (4)	0.010 (4)
C18	0.070 (6)	0.076	0.067 (7)	−0.017 (5)	0.020 (5)	0.015 (5)
C19	0.054 (6)	0.090 (7)	0.044 (6)	−0.025 (5)	0.009 (4)	0.012 (5)
C20	0.063 (5)	0.064	0.083 (7)	−0.008 (5)	0.052 (5)	−0.002 (6)
C21	0.059 (6)	0.081 (7)	0.050 (7)	−0.016 (5)	0.012 (5)	0.014 (6)
C22	0.089 (7)	0.085	0.093 (8)	0.010 (7)	0.048 (6)	0.002 (7)
C23	0.056 (8)	0.088 (12)	0.057 (8)	−0.004 (6)	0.031 (5)	0.018 (6)
C24	0.051 (7)	0.071 (8)	0.066 (7)	−0.005 (5)	0.033 (5)	0.013 (6)
O25	0.085 (8)	0.064 (9)	0.108 (10)	−0.001 (5)	0.068 (6)	0.018 (6)

Geometric parameters (Å, º) top

O1—C2	1.226 (6)	C18—H18B	0.9700
C2—C3	1.471 (7)	C19—C21	1.352 (13)
C2—C4	1.512 (7)	C19—C20	1.353 (13)
C3—C9	1.389 (6)	C20—C22	1.391 (12)
C3—C5	1.398 (7)	C20—H20	0.9300
C4—H4A	0.9600	C21—C24	1.378 (13)
C4—H4B	0.9600	C21—H21	0.9300
C4—H4C	0.9600	C22—C23	1.391 (13)
C5—C6	1.372 (7)	C22—H22	0.9300
C5—H5	0.9300	C23—C24	1.35 (2)
C6—C7	1.380 (7)	C23—O25	1.46 (3)
C6—H6	0.9300	C24—H24	0.9300
C7—C8	1.381 (7)	O25—H25	0.95 (12)
C7—N10	1.411 (6)	C15A—O16A	1.24 (3)
C8—C9	1.377 (7)	C15A—C17A	1.53 (2)
C8—H8	0.9300	C17A—C18A	1.50 (4)
C9—H9	0.9300	C17A—H17C	0.9700
N10—C11	1.354 (6)	C17A—H17D	0.9700
N10—H10	0.86 (5)	C18A—C19A	1.51 (3)
C11—O12	1.212 (6)	C18A—H18C	0.9700
C11—C13	1.503 (7)	C18A—H18D	0.9700
C13—O14	1.421 (5)	C19A—C21A	1.37 (2)
C13—H13A	0.9700	C19A—C20A	1.41 (2)
C13—H13B	0.9700	C20A—C22A	1.37 (2)
O14—C15A	1.37 (3)	C20A—H20A	0.9300
O14—C15	1.373 (11)	C21A—C24A	1.39 (3)
C15—O16	1.176 (12)	C21A—H21A	0.9300
C15—C17	1.514 (10)	C22A—C23A	1.38 (2)
C17—C18	1.525 (13)	C22A—H22A	0.9300
C17—H17A	0.9700	C23A—O25A	1.26 (7)
C17—H17B	0.9700	C23A—C24A	1.37 (3)
C18—C19	1.525 (11)	C24A—H24A	0.9300
C18—H18A	0.9700	O25A—H25A	0.90 (3)

O1—C2—C3	120.8 (5)	H18A—C18—H18B	107.7
O1—C2—C4	119.3 (5)	C21—C19—C20	118.0 (8)
C3—C2—C4	119.9 (5)	C21—C19—C18	121.9 (9)
C9—C3—C5	117.6 (4)	C20—C19—C18	120.1 (9)
C9—C3—C2	123.7 (4)	C19—C20—C22	121.7 (8)
C5—C3—C2	118.7 (5)	C19—C20—H20	119.2
C2—C4—H4A	109.5	C22—C20—H20	119.2
C2—C4—H4B	109.5	C19—C21—C24	121.7 (12)
H4A—C4—H4B	109.5	C19—C21—H21	119.2
C2—C4—H4C	109.5	C24—C21—H21	119.2
H4A—C4—H4C	109.5	C20—C22—C23	119.2 (11)
H4B—C4—H4C	109.5	C20—C22—H22	120.4
C6—C5—C3	120.6 (5)	C23—C22—H22	120.4
C6—C5—H5	119.7	C24—C23—C22	118.5 (12)
C3—C5—H5	119.7	C24—C23—O25	126.0 (17)
C5—C6—C7	120.8 (5)	C22—C23—O25	115.6 (19)
C5—C6—H6	119.6	C23—C24—C21	121.0 (12)
C7—C6—H6	119.6	C23—C24—H24	119.5
C6—C7—C8	119.5 (4)	C21—C24—H24	119.5
C6—C7—N10	116.5 (4)	C23—O25—H25	105 (8)
C8—C7—N10	124.0 (4)	O16A—C15A—O14	113 (3)
C9—C8—C7	119.6 (5)	O16A—C15A—C17A	135 (3)
C9—C8—H8	120.2	O14—C15A—C17A	105.6 (19)
C7—C8—H8	120.2	C18A—C17A—C15A	108 (2)
C8—C9—C3	121.8 (5)	C18A—C17A—H17C	110.1
C8—C9—H9	119.1	C15A—C17A—H17C	110.1
C3—C9—H9	119.1	C18A—C17A—H17D	110.1
C11—N10—C7	130.0 (4)	C15A—C17A—H17D	110.1
C11—N10—H10	118 (4)	H17C—C17A—H17D	108.4
C7—N10—H10	112 (4)	C17A—C18A—C19A	113 (2)
O12—C11—N10	125.0 (5)	C17A—C18A—H18C	108.9
O12—C11—C13	123.6 (5)	C19A—C18A—H18C	108.9
N10—C11—C13	111.4 (4)	C17A—C18A—H18D	108.9
O14—C13—C11	109.0 (4)	C19A—C18A—H18D	108.9
O14—C13—H13A	109.9	H18C—C18A—H18D	107.7
C11—C13—H13A	109.9	C21A—C19A—C20A	119 (2)
O14—C13—H13B	109.9	C21A—C19A—C18A	128 (2)
C11—C13—H13B	109.9	C20A—C19A—C18A	112.3 (19)
H13A—C13—H13B	108.3	C22A—C20A—C19A	119 (2)
C15A—O14—C13	113.9 (10)	C22A—C20A—H20A	120.3
C15—O14—C13	114.3 (5)	C19A—C20A—H20A	120.3
O16—C15—O14	122.3 (8)	C19A—C21A—C24A	122 (2)
O16—C15—C17	123.7 (9)	C19A—C21A—H21A	118.8
O14—C15—C17	112.7 (8)	C24A—C21A—H21A	118.8
C15—C17—C18	110.2 (7)	C20A—C22A—C23A	119 (2)
C15—C17—H17A	109.6	C20A—C22A—H22A	120.5
C18—C17—H17A	109.6	C23A—C22A—H22A	120.5
C15—C17—H17B	109.6	O25A—C23A—C24A	117 (5)
C18—C17—H17B	109.6	O25A—C23A—C22A	119 (5)
H17A—C17—H17B	108.1	C24A—C23A—C22A	124 (3)
C19—C18—C17	113.5 (5)	C23A—C24A—C21A	116 (3)
C19—C18—H18A	108.9	C23A—C24A—H24A	122.0
C17—C18—H18A	108.9	C21A—C24A—H24A	122.0
C19—C18—H18B	108.9	C23A—O25A—H25A	103 (10)
C17—C18—H18B	108.9

O1—C2—C3—C9	−179.6 (5)	C17—C18—C19—C20	88.3 (8)
C4—C2—C3—C9	0.7 (8)	C21—C19—C20—C22	−0.5 (5)
O1—C2—C3—C5	−0.9 (9)	C18—C19—C20—C22	179.7 (3)
C4—C2—C3—C5	179.3 (5)	C20—C19—C21—C24	0.5 (8)
C9—C3—C5—C6	0.5 (8)	C18—C19—C21—C24	−179.7 (5)
C2—C3—C5—C6	−178.2 (5)	C19—C20—C22—C23	0.6 (7)
C3—C5—C6—C7	0.9 (8)	C20—C22—C23—C24	−0.6 (9)
C5—C6—C7—C8	−1.5 (9)	C20—C22—C23—O25	179.7 (5)
C5—C6—C7—N10	179.1 (5)	C22—C23—C24—C21	0.6 (10)
C6—C7—C8—C9	0.7 (9)	O25—C23—C24—C21	−179.7 (6)
N10—C7—C8—C9	180.0 (5)	C19—C21—C24—C23	−0.6 (10)
C7—C8—C9—C3	0.8 (9)	C15—O14—C15A—O16A	60 (4)
C5—C3—C9—C8	−1.3 (8)	C13—O14—C15A—O16A	−36 (4)
C2—C3—C9—C8	177.3 (6)	C15—O14—C15A—C17A	−96 (3)
C6—C7—N10—C11	−179.6 (5)	C13—O14—C15A—C17A	167.6 (15)
C8—C7—N10—C11	1.0 (10)	O16A—C15A—C17A—C18A	14 (7)
C7—N10—C11—O12	2.6 (10)	O14—C15A—C17A—C18A	162 (2)
C7—N10—C11—C13	−176.3 (5)	C15A—C17A—C18A—C19A	173.0 (16)
O12—C11—C13—O14	2.7 (7)	C17A—C18A—C19A—C21A	6 (2)
N10—C11—C13—O14	−178.4 (5)	C17A—C18A—C19A—C20A	−174 (2)
C11—C13—O14—C15A	−158.1 (12)	C21A—C19A—C20A—C22A	−0.1 (5)
C11—C13—O14—C15	175.5 (7)	C18A—C19A—C20A—C22A	179.9 (4)
C15A—O14—C15—O16	−85 (3)	C20A—C19A—C21A—C24A	0.0 (8)
C13—O14—C15—O16	9.0 (15)	C18A—C19A—C21A—C24A	−180.0 (5)
C15A—O14—C15—C17	82 (3)	C19A—C20A—C22A—C23A	0.1 (8)
C13—O14—C15—C17	176.8 (6)	C20A—C22A—C23A—O25A	179.9 (6)
O16—C15—C17—C18	80.5 (15)	C20A—C22A—C23A—C24A	−0.1 (11)
O14—C15—C17—C18	−87.2 (10)	O25A—C23A—C24A—C21A	−179.9 (7)
C15—C17—C18—C19	−170.4 (8)	C22A—C23A—C24A—C21A	0.1 (11)
C17—C18—C19—C21	−91.5 (8)	C19A—C21A—C24A—C23A	−0.1 (10)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N10—H10···O1ⁱ	0.86 (5)	2.11 (5)	2.925 (5)	159 (4)
O25—H25···O12ⁱⁱ	0.95 (12)	1.93 (11)	2.87 (3)	172 (13)
C4—H4A···O16ⁱⁱⁱ	0.96	2.59	3.416 (10)	144
C13—H13B···O25^iv	0.97	2.60	3.458 (17)	147
C13—H13B···O25A^iv	0.97	2.50	3.34 (4)	145
C24—H24···O12ⁱⁱ	0.93	2.57	3.284 (11)	133

Symmetry codes: (i) −x+2, y−1/2, −z; (ii) −x, y−1/2, −z+1; (iii) x, y+1, z; (iv) −x+1, y+1/2, −z+1.

Acknowledgements

This work was supported by the research fund of Chungnam National University.

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