Methyl 3,5-diacet­oxy-4-methoxy­benzoate

The title compound, C₁₃H₁₄O₇, is derived from methyl gallate, a protective biological anti­oxidant. It crystallizes with two independent mol­ecules in the asymmetric unit.

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean [sigma](C-C) = 0.007 Å
• R factor = 0.073
• wR factor = 0.208
• Data-to-parameter ratio = 13.9

checkCIF/PLATON results

No syntax errors found



Alert level B
RINTA01_ALERT_3_B  The value of Rint is greater than 0.15
            Rint given   0.164
PLAT020_ALERT_3_B The value of Rint is greater than 0.10 .........       0.16

Alert level C
PLAT026_ALERT_3_C Ratio Observed / Unique Reflections too Low ....         47 Perc.
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT152_ALERT_1_C Supplied and Calc Volume s.u. Inconsistent .....          ?
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        C11
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        C22
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        C24
PLAT340_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ...          6

Alert level G
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K

   0 ALERT level A = In general: serious problem
   2 ALERT level B = Potentially serious problem
   7 ALERT level C = Check and explain
   2 ALERT level G = General alerts; check

   4 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   3 ALERT type 2 Indicator that the structure model may be wrong or deficient
   4 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

---

Computing details

Data collection: SMART (Bruker, 2003); cell refinement: SAINT (Bruker, 2003); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXL97.

Methyl 3,5-diacetoxy-4-methoxybenzoate

Crystal data

C13H14O7	F(000) = 1184
Mr = 282.24	Dx = 1.356 Mg m^−3
Monoclinic, P21/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc	Cell parameters from 2025 reflections
a = 9.0530 (18) Å	θ = 2.1–26.1°
b = 25.769 (5) Å	µ = 0.11 mm^−1
c = 11.864 (2) Å	T = 293 K
β = 92.57 (3)°	Prism, colorless
V = 2764.9 (10) Å^3	0.30 × 0.20 × 0.15 mm
Z = 8

Data collection

Bruker APEX area-detector diffractometer	5146 independent reflections
Radiation source: fine-focus sealed tube	2421 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.164
φ and ω scans	θmax = 25.5°, θmin = 1.6°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = 0→10
Tmin = 0.967, Tmax = 0.984	k = 0→31
5484 measured reflections	l = −14→14

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.073	Hydrogen site location: inferred from neighbouring sites
wR(F^2) = 0.208	H-atom parameters constrained
S = 1.05	w = 1/[σ^2(Fo^2) + (0.0788P)^2 + 0.5721P] where P = (Fo^2 + 2Fc^2)/3
5146 reflections	(Δ/σ)max < 0.001
369 parameters	Δρmax = 0.27 e Å^−3
0 restraints	Δρmin = −0.31 e Å^−3

Special details

Experimental. ¹H NMR (CDCl₃, 500 MHz): 2.34 (s, 6H, OAc), 3.89 (s, 3H, OMe), 3.90 (s, 3H, OMe), 7.72 (s, 2H, Ar—H).

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

Refinement. Refinement of F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
O1	−0.0090 (3)	0.36143 (12)	0.2798 (2)	0.0616 (9)
O2	0.3803 (4)	0.22148 (13)	0.6106 (3)	0.0755 (10)
O3	0.2876 (5)	0.16001 (15)	0.4966 (3)	0.0900 (12)
O4	−0.0183 (4)	0.36172 (14)	0.6142 (3)	0.0738 (10)
O5	0.1419 (3)	0.38594 (11)	0.4855 (2)	0.0553 (8)
O6	−0.2028 (4)	0.26101 (17)	0.2565 (3)	0.0901 (12)
O7	0.0213 (3)	0.26668 (12)	0.1874 (2)	0.0561 (8)
O8	0.4689 (4)	0.52058 (14)	0.3311 (3)	0.0818 (11)
O9	0.8467 (4)	0.49233 (16)	−0.1034 (3)	0.0927 (12)
O10	0.8619 (4)	0.41409 (15)	−0.0240 (3)	0.0757 (10)
O11	0.5758 (4)	0.41714 (12)	0.3166 (3)	0.0691 (9)
O12	0.7807 (4)	0.43833 (15)	0.4177 (3)	0.0812 (11)
O13	0.4966 (3)	0.58549 (13)	0.1519 (3)	0.0683 (9)
O14	0.6618 (4)	0.62135 (13)	0.2725 (3)	0.0837 (11)
C1	0.0733 (5)	0.32573 (17)	0.3384 (3)	0.0469 (10)
C2	0.1443 (5)	0.33548 (16)	0.4432 (3)	0.0466 (11)
C3	0.2204 (5)	0.29716 (17)	0.5013 (3)	0.0505 (11)
H3	0.2683	0.3046	0.5704	0.061*
C4	0.2263 (5)	0.24775 (17)	0.4579 (4)	0.0502 (11)
C5	0.1556 (4)	0.23694 (17)	0.3525 (3)	0.0516 (11)
H5	0.1586	0.2037	0.3220	0.062*
C6	0.0829 (4)	0.27579 (18)	0.2961 (3)	0.0481 (11)
C7	0.2997 (5)	0.2046 (2)	0.5208 (4)	0.0575 (12)
C8	0.0671 (6)	0.4054 (2)	0.2387 (4)	0.0818 (16)
H8A	0.1309	0.4194	0.2980	0.123*
H8B	−0.0033	0.4312	0.2137	0.123*
H8C	0.1251	0.3951	0.1767	0.123*
C9	0.0566 (5)	0.39462 (19)	0.5763 (4)	0.0556 (12)
C10	0.0735 (5)	0.44868 (18)	0.6159 (4)	0.0665 (14)
H10A	−0.0097	0.4580	0.6591	0.100*
H10B	0.0786	0.4714	0.5522	0.100*
H10C	0.1626	0.4518	0.6624	0.100*
C11	−0.1268 (6)	0.26246 (19)	0.1774 (4)	0.0597 (12)
C12	−0.1771 (6)	0.2610 (2)	0.0561 (4)	0.0826 (17)
H12A	−0.2813	0.2541	0.0500	0.124*
H12B	−0.1248	0.2342	0.0183	0.124*
H12C	−0.1574	0.2939	0.0217	0.124*
C13	0.4499 (6)	0.1816 (2)	0.6811 (5)	0.0917 (18)
H13A	0.3754	0.1627	0.7188	0.138*
H13B	0.5165	0.1975	0.7361	0.138*
H13C	0.5039	0.1584	0.6351	0.138*
C14	0.5471 (5)	0.50390 (19)	0.2421 (4)	0.0570 (12)
C15	0.5724 (5)	0.53867 (19)	0.1554 (4)	0.0554 (12)
C16	0.6586 (5)	0.52527 (19)	0.0681 (4)	0.0555 (12)
H16	0.6747	0.5491	0.0110	0.067*
C17	0.7218 (5)	0.47634 (18)	0.0643 (3)	0.0521 (11)
C18	0.6930 (5)	0.44094 (18)	0.1483 (4)	0.0543 (11)
H18	0.7316	0.4075	0.1451	0.065*
C19	0.6082 (5)	0.45478 (18)	0.2359 (3)	0.0526 (11)
C20	0.8154 (5)	0.4627 (2)	−0.0300 (4)	0.0620 (13)
C21	0.3409 (6)	0.4948 (3)	0.3568 (5)	0.108 (2)
H21A	0.3395	0.4612	0.3220	0.162*
H21B	0.2567	0.5145	0.3293	0.162*
H21C	0.3375	0.4909	0.4372	0.162*
C22	0.5510 (6)	0.6252 (2)	0.2171 (4)	0.0636 (13)
C23	0.4531 (6)	0.6710 (2)	0.2071 (5)	0.0883 (17)
H23A	0.3668	0.6652	0.2495	0.132*
H23B	0.4240	0.6765	0.1292	0.132*
H23C	0.5049	0.7010	0.2360	0.132*
C24	0.6749 (6)	0.4123 (2)	0.4062 (4)	0.0627 (13)
C25	0.6228 (7)	0.3704 (2)	0.4825 (5)	0.108 (2)
H25A	0.6189	0.3380	0.4426	0.162*
H25B	0.5260	0.3789	0.5068	0.162*
H25C	0.6901	0.3675	0.5471	0.162*
C26	0.9566 (7)	0.3966 (3)	−0.1115 (5)	0.114 (2)
H26A	0.9011	0.3955	−0.1823	0.171*
H26B	0.9936	0.3626	−0.0932	0.171*
H26C	1.0380	0.4202	−0.1171	0.171*

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
O1	0.069 (2)	0.058 (2)	0.0569 (19)	−0.0002 (17)	−0.0145 (16)	0.0125 (16)
O2	0.081 (2)	0.064 (2)	0.078 (2)	0.0072 (18)	−0.025 (2)	0.0105 (19)
O3	0.138 (3)	0.054 (2)	0.076 (2)	0.018 (2)	−0.014 (2)	0.001 (2)
O4	0.094 (3)	0.060 (2)	0.069 (2)	−0.008 (2)	0.022 (2)	−0.0049 (18)
O5	0.077 (2)	0.0460 (19)	0.0426 (17)	−0.0048 (15)	0.0000 (15)	−0.0019 (14)
O6	0.066 (2)	0.141 (4)	0.064 (2)	−0.030 (2)	0.0055 (19)	0.001 (2)
O7	0.060 (2)	0.074 (2)	0.0335 (16)	−0.0065 (16)	−0.0004 (14)	−0.0118 (14)
O8	0.080 (2)	0.096 (3)	0.072 (2)	−0.022 (2)	0.026 (2)	−0.032 (2)
O9	0.125 (3)	0.093 (3)	0.062 (2)	−0.003 (2)	0.026 (2)	0.019 (2)
O10	0.093 (3)	0.079 (3)	0.056 (2)	0.018 (2)	0.0205 (18)	−0.0005 (18)
O11	0.085 (2)	0.067 (2)	0.055 (2)	−0.0207 (18)	0.0066 (18)	0.0023 (17)
O12	0.097 (3)	0.083 (3)	0.062 (2)	−0.025 (2)	−0.011 (2)	0.0055 (19)
O13	0.068 (2)	0.061 (2)	0.074 (2)	0.0069 (18)	−0.0195 (17)	−0.0085 (18)
O14	0.100 (3)	0.066 (2)	0.081 (3)	0.006 (2)	−0.035 (2)	−0.0123 (19)
C1	0.050 (3)	0.051 (3)	0.040 (2)	−0.004 (2)	0.002 (2)	0.003 (2)
C2	0.057 (3)	0.047 (3)	0.036 (2)	−0.002 (2)	0.002 (2)	−0.003 (2)
C3	0.057 (3)	0.056 (3)	0.039 (2)	−0.002 (2)	−0.001 (2)	0.003 (2)
C4	0.052 (3)	0.051 (3)	0.048 (3)	0.000 (2)	0.003 (2)	0.000 (2)
C5	0.056 (3)	0.048 (3)	0.052 (3)	−0.001 (2)	0.008 (2)	−0.007 (2)
C6	0.051 (3)	0.059 (3)	0.034 (2)	−0.001 (2)	0.0017 (19)	−0.004 (2)
C7	0.065 (3)	0.053 (3)	0.055 (3)	0.005 (3)	0.007 (2)	0.006 (3)
C8	0.090 (4)	0.078 (4)	0.076 (4)	−0.014 (3)	−0.004 (3)	0.029 (3)
C9	0.070 (3)	0.054 (3)	0.042 (3)	0.000 (3)	−0.008 (2)	−0.001 (2)
C10	0.090 (4)	0.054 (3)	0.054 (3)	0.009 (3)	−0.013 (3)	−0.007 (2)
C11	0.056 (3)	0.069 (3)	0.054 (3)	−0.010 (3)	−0.003 (2)	−0.002 (2)
C12	0.093 (4)	0.099 (4)	0.054 (3)	−0.004 (3)	−0.018 (3)	−0.007 (3)
C13	0.090 (4)	0.083 (4)	0.099 (4)	0.019 (3)	−0.027 (3)	0.030 (3)
C14	0.058 (3)	0.064 (3)	0.048 (3)	−0.015 (3)	0.002 (2)	−0.016 (2)
C15	0.057 (3)	0.052 (3)	0.056 (3)	−0.002 (2)	−0.013 (2)	−0.008 (2)
C16	0.058 (3)	0.062 (3)	0.045 (3)	−0.004 (2)	−0.011 (2)	0.004 (2)
C17	0.055 (3)	0.059 (3)	0.042 (2)	−0.002 (2)	−0.002 (2)	0.004 (2)
C18	0.062 (3)	0.049 (3)	0.051 (3)	−0.004 (2)	−0.001 (2)	−0.005 (2)
C19	0.070 (3)	0.048 (3)	0.040 (2)	−0.008 (2)	0.004 (2)	0.003 (2)
C20	0.070 (3)	0.073 (4)	0.042 (3)	−0.001 (3)	−0.002 (2)	0.005 (3)
C21	0.079 (4)	0.150 (6)	0.096 (5)	−0.025 (4)	0.034 (4)	−0.031 (4)
C22	0.074 (4)	0.061 (3)	0.055 (3)	0.005 (3)	−0.005 (3)	0.004 (3)
C23	0.110 (5)	0.068 (4)	0.086 (4)	0.023 (3)	0.002 (3)	−0.003 (3)
C24	0.084 (4)	0.059 (3)	0.044 (3)	−0.007 (3)	0.002 (3)	−0.005 (2)
C25	0.132 (5)	0.107 (5)	0.084 (4)	−0.031 (4)	−0.006 (4)	0.048 (4)
C26	0.140 (6)	0.109 (5)	0.097 (5)	0.031 (4)	0.061 (4)	0.002 (4)

Geometric parameters (Å, º)

O1—C1	1.356 (5)	C9—C10	1.476 (6)
O1—C8	1.423 (5)	C10—H10A	0.9600
O2—C7	1.337 (5)	C10—H10B	0.9600
O2—C13	1.450 (5)	C10—H10C	0.9600
O3—C7	1.188 (5)	C11—C12	1.491 (6)
O4—C9	1.187 (5)	C12—H12A	0.9600
O5—C9	1.371 (5)	C12—H12B	0.9600
O5—C2	1.394 (5)	C12—H12C	0.9600
O6—C11	1.189 (5)	C13—H13A	0.9600
O7—C11	1.345 (5)	C13—H13B	0.9600
O7—C6	1.401 (5)	C13—H13C	0.9600
O8—C14	1.366 (5)	C14—C19	1.385 (6)
O8—C21	1.382 (6)	C14—C15	1.391 (6)
O9—C20	1.201 (5)	C15—C16	1.369 (6)
O10—C20	1.323 (6)	C16—C17	1.386 (6)
O10—C26	1.448 (6)	C16—H16	0.9300
O11—C24	1.366 (6)	C17—C18	1.384 (6)
O11—C19	1.403 (5)	C17—C20	1.476 (6)
O12—C24	1.173 (5)	C18—C19	1.367 (6)
O13—C22	1.361 (6)	C18—H18	0.9300
O13—C15	1.388 (5)	C21—H21A	0.9600
O14—C22	1.178 (5)	C21—H21B	0.9600
C1—C6	1.386 (6)	C21—H21C	0.9600
C1—C2	1.397 (5)	C22—C23	1.477 (7)
C2—C3	1.372 (6)	C23—H23A	0.9600
C3—C4	1.375 (6)	C23—H23B	0.9600
C3—H3	0.9300	C23—H23C	0.9600
C4—C5	1.407 (6)	C24—C25	1.498 (7)
C4—C7	1.480 (6)	C25—H25A	0.9600
C5—C6	1.358 (6)	C25—H25B	0.9600
C5—H5	0.9300	C25—H25C	0.9600
C8—H8A	0.9600	C26—H26A	0.9600
C8—H8B	0.9600	C26—H26B	0.9600
C8—H8C	0.9600	C26—H26C	0.9600
C1—O1—C8	116.9 (4)	H13A—C13—H13B	109.5
C7—O2—C13	115.9 (4)	O2—C13—H13C	109.5
C9—O5—C2	116.9 (3)	H13A—C13—H13C	109.5
C11—O7—C6	116.7 (3)	H13B—C13—H13C	109.5
C14—O8—C21	119.2 (4)	O8—C14—C19	123.4 (4)
C20—O10—C26	116.9 (4)	O8—C14—C15	118.5 (5)
C24—O11—C19	116.4 (4)	C19—C14—C15	118.0 (4)
C22—O13—C15	118.1 (4)	C16—C15—O13	119.7 (4)
O1—C1—C6	119.1 (4)	C16—C15—C14	121.1 (5)
O1—C1—C2	123.7 (4)	O13—C15—C14	118.9 (4)
C6—C1—C2	117.1 (4)	C15—C16—C17	120.3 (4)
C3—C2—O5	120.4 (4)	C15—C16—H16	119.9
C3—C2—C1	121.2 (4)	C17—C16—H16	119.9
O5—C2—C1	118.3 (4)	C18—C17—C16	119.0 (4)
C2—C3—C4	120.4 (4)	C18—C17—C20	121.5 (4)
C2—C3—H3	119.8	C16—C17—C20	119.5 (4)
C4—C3—H3	119.8	C19—C18—C17	120.4 (4)
C3—C4—C5	119.5 (4)	C19—C18—H18	119.8
C3—C4—C7	122.1 (4)	C17—C18—H18	119.8
C5—C4—C7	118.4 (4)	C18—C19—C14	121.2 (4)
C6—C5—C4	118.9 (4)	C18—C19—O11	118.7 (4)
C6—C5—H5	120.5	C14—C19—O11	120.0 (4)
C4—C5—H5	120.5	O9—C20—O10	123.8 (5)
C5—C6—C1	122.9 (4)	O9—C20—C17	124.1 (5)
C5—C6—O7	119.6 (4)	O10—C20—C17	112.1 (4)
C1—C6—O7	117.4 (4)	O8—C21—H21A	109.5
O3—C7—O2	123.3 (4)	O8—C21—H21B	109.5
O3—C7—C4	124.7 (5)	H21A—C21—H21B	109.5
O2—C7—C4	112.0 (4)	O8—C21—H21C	109.5
O1—C8—H8A	109.5	H21A—C21—H21C	109.5
O1—C8—H8B	109.5	H21B—C21—H21C	109.5
H8A—C8—H8B	109.5	O14—C22—O13	122.1 (5)
O1—C8—H8C	109.5	O14—C22—C23	127.2 (5)
H8A—C8—H8C	109.5	O13—C22—C23	110.8 (5)
H8B—C8—H8C	109.5	C22—C23—H23A	109.5
O4—C9—O5	122.2 (4)	C22—C23—H23B	109.5
O4—C9—C10	127.3 (5)	H23A—C23—H23B	109.5
O5—C9—C10	110.5 (4)	C22—C23—H23C	109.5
C9—C10—H10A	109.5	H23A—C23—H23C	109.5
C9—C10—H10B	109.5	H23B—C23—H23C	109.5
H10A—C10—H10B	109.5	O12—C24—O11	122.8 (5)
C9—C10—H10C	109.5	O12—C24—C25	128.3 (5)
H10A—C10—H10C	109.5	O11—C24—C25	108.9 (5)
H10B—C10—H10C	109.5	C24—C25—H25A	109.5
O6—C11—O7	122.9 (4)	C24—C25—H25B	109.5
O6—C11—C12	126.8 (5)	H25A—C25—H25B	109.5
O7—C11—C12	110.3 (4)	C24—C25—H25C	109.5
C11—C12—H12A	109.5	H25A—C25—H25C	109.5
C11—C12—H12B	109.5	H25B—C25—H25C	109.5
H12A—C12—H12B	109.5	O10—C26—H26A	109.5
C11—C12—H12C	109.5	O10—C26—H26B	109.5
H12A—C12—H12C	109.5	H26A—C26—H26B	109.5
H12B—C12—H12C	109.5	O10—C26—H26C	109.5
O2—C13—H13A	109.5	H26A—C26—H26C	109.5
O2—C13—H13B	109.5	H26B—C26—H26C	109.5
C8—O1—C1—C6	−117.2 (5)	C21—O8—C14—C19	−60.9 (6)
C8—O1—C1—C2	66.2 (6)	C21—O8—C14—C15	122.1 (5)
C9—O5—C2—C3	−73.6 (5)	C22—O13—C15—C16	−103.8 (5)
C9—O5—C2—C1	109.4 (4)	C22—O13—C15—C14	82.9 (5)
O1—C1—C2—C3	176.9 (4)	O8—C14—C15—C16	175.4 (4)
C6—C1—C2—C3	0.2 (6)	C19—C14—C15—C16	−1.8 (6)
O1—C1—C2—O5	−6.1 (6)	O8—C14—C15—O13	−11.3 (6)
C6—C1—C2—O5	177.2 (4)	C19—C14—C15—O13	171.5 (4)
O5—C2—C3—C4	−178.1 (4)	O13—C15—C16—C17	−172.9 (4)
C1—C2—C3—C4	−1.1 (6)	C14—C15—C16—C17	0.3 (6)
C2—C3—C4—C5	1.0 (6)	C15—C16—C17—C18	1.9 (6)
C2—C3—C4—C7	−176.3 (4)	C15—C16—C17—C20	−179.5 (4)
C3—C4—C5—C6	0.0 (6)	C16—C17—C18—C19	−2.6 (6)
C7—C4—C5—C6	177.4 (4)	C20—C17—C18—C19	178.8 (4)
C4—C5—C6—C1	−0.9 (6)	C17—C18—C19—C14	1.1 (6)
C4—C5—C6—O7	175.3 (4)	C17—C18—C19—O11	177.1 (4)
O1—C1—C6—C5	−176.0 (4)	O8—C14—C19—C18	−176.0 (4)
C2—C1—C6—C5	0.8 (6)	C15—C14—C19—C18	1.1 (6)
O1—C1—C6—O7	7.7 (6)	O8—C14—C19—O11	8.1 (6)
C2—C1—C6—O7	−175.4 (4)	C15—C14—C19—O11	−174.9 (4)
C11—O7—C6—C5	106.6 (5)	C24—O11—C19—C18	88.7 (5)
C11—O7—C6—C1	−77.0 (5)	C24—O11—C19—C14	−95.2 (5)
C13—O2—C7—O3	−2.2 (7)	C26—O10—C20—O9	0.4 (7)
C13—O2—C7—C4	176.7 (4)	C26—O10—C20—C17	−179.1 (4)
C3—C4—C7—O3	167.0 (5)	C18—C17—C20—O9	−178.1 (5)
C5—C4—C7—O3	−10.3 (7)	C16—C17—C20—O9	3.3 (7)
C3—C4—C7—O2	−11.9 (6)	C18—C17—C20—O10	1.4 (6)
C5—C4—C7—O2	170.8 (4)	C16—C17—C20—O10	−177.2 (4)
C2—O5—C9—O4	−3.8 (6)	C15—O13—C22—O14	2.5 (7)
C2—O5—C9—C10	176.1 (3)	C15—O13—C22—C23	−177.3 (4)
C6—O7—C11—O6	−7.6 (7)	C19—O11—C24—O12	1.3 (7)
C6—O7—C11—C12	171.3 (4)	C19—O11—C24—C25	−179.7 (4)