##############################################################################
###                                                                        ###
###        Electronic paper (Acta Crystallographica Section E)             ###
###                                                                        ###
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#                                                                            #
# This CIF contains the data in a paper accepted for publication in Acta     #
# Crystallographica Section E. It conforms to the requirements of Notes      #
# for Authors for Section E, and has been peer reviewed under the auspices   #
# of the IUCr Commission on Journals.                                        #
#                                                                            #
# Full details of the Crystallographic Information File format               #
# are given in the paper "The Crystallographic Information File (CIF):       #
# a New Standard Archive File for Crystallography" by S. R. Hall, F. H.      #
# Allen and I. D. Brown [Acta Cryst. (1991), A47, 655-685].                  #
#                                                                            #
# The current version of the core CIF dictionary is obtainable from          #
# ftp://ftp.iucr.org/pub/cif_core.dic. The current version number is 2.1.    #
#                                                                            #
# Software is freely available for graphical display of the structure(s) in  #
# this CIF.  For information consult the CIF home page http://www.iucr.org/  #
# cif/home.html                                                              #
#                                                                            #
#            Copyright International Union of Crystallography                #
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##############################################################################
                                             
data_I
_audit_creation_method     SHELXL97
_chemical_name_systematic
;
(E)-2-[2-(4-Bromobenzoylmethylene)imidazolidin-1-yl]ethyl
4-bromobenzoate
;
_chemical_name_common     ?
_chemical_formula_moiety     'C20 H18 Br2 N2 O3'
_chemical_formula_sum     'C20 H18 Br2 N2 O3'
_chemical_formula_iupac     'C20 H18 Br2 N2 O3'
_chemical_formula_weight     494.18
_chemical_melting_point     449
_symmetry_cell_setting     triclinic
_symmetry_space_group_name_H-M     'P -1'
_symmetry_space_group_name_Hall     '-P 1'
loop_
    _symmetry_equiv_pos_as_xyz
    'x, y, z'
    '-x, -y, -z'
_cell_length_a     7.3733(15)
_cell_length_b     11.117(2)
_cell_length_c     12.954(2)
_cell_angle_alpha     104.635(10)
_cell_angle_beta     105.108(11)
_cell_angle_gamma     96.700(9)
_cell_volume     972.7(3)
_cell_formula_units_Z     2
_cell_measurement_reflns_used     1807
_cell_measurement_theta_min     2.93
_cell_measurement_theta_max     25.39
_cell_measurement_temperature     294(2)
_exptl_crystal_description     prism
_exptl_crystal_colour     colourless
_exptl_crystal_size_max     0.39
_exptl_crystal_size_mid     0.37
_exptl_crystal_size_min     0.34
_exptl_crystal_density_diffrn     1.687
_exptl_crystal_density_meas     ?
_exptl_crystal_density_method     'not measured'
_exptl_crystal_F_000     492
_exptl_absorpt_coefficient_mu     4.190
_exptl_absorpt_correction_type     multi-scan
_exptl_absorpt_process_details     '(SADABS; Bruker, 1997)'
_exptl_absorpt_correction_T_min     0.2918
_exptl_absorpt_correction_T_max     0.3300
_exptl_special_details
;
;
_diffrn_ambient_temperature     294(2)
_diffrn_radiation_type     MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_source     'fine-focus sealed tube'
_diffrn_radiation_monochromator     graphite
_diffrn_measurement_device_type     'Bruker SMART CCD area-detector'
_diffrn_measurement_method     'φ and ω'
_diffrn_detector_area_resol_mean     ?
_diffrn_reflns_number     4924
_diffrn_reflns_av_R_equivalents     0.0242
_diffrn_reflns_av_sigmaI/netI     0.0535
_diffrn_reflns_theta_min     1.70
_diffrn_reflns_theta_max     25.01
_diffrn_reflns_theta_full     25.01
_diffrn_measured_fraction_theta_max     0.989
_diffrn_measured_fraction_theta_full     0.989
_diffrn_reflns_limit_h_min     -4
_diffrn_reflns_limit_h_max     8
_diffrn_reflns_limit_k_min     -13
_diffrn_reflns_limit_k_max     11
_diffrn_reflns_limit_l_min     -15
_diffrn_reflns_limit_l_max     15
_diffrn_standards_number     ?
_diffrn_standards_interval_count     ?
_diffrn_standards_interval_time     ?
_diffrn_standards_decay_%     ?
_refine_special_details
;
 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 > 2sigma(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.
;
_reflns_number_total     3389
_reflns_number_gt     2404
_reflns_threshold_expression     I>2σ(I)
_refine_ls_structure_factor_coef     Fsqd
_refine_ls_matrix_type     full
_refine_ls_R_factor_all     0.0779
_refine_ls_R_factor_gt     0.0501
_refine_ls_wR_factor_gt     0.1249
_refine_ls_wR_factor_ref     0.1368
_refine_ls_goodness_of_fit_ref     1.041
_refine_ls_restrained_S_all     1.041
_refine_ls_number_reflns     3389
_refine_ls_number_parameters     247
_refine_ls_number_restraints     0
_refine_ls_hydrogen_treatment     mixed
_refine_ls_weighting_scheme     calc
_refine_ls_weighting_details
       'calc w = 1/[σ²(Fo²)+(0.0744P)²+0.4017P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_hydrogens     geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary     difmap
_refine_ls_shift/su_max     0.000
_refine_ls_shift/su_mean     0.000
_refine_diff_density_max     0.880
_refine_diff_density_min     -0.777
_refine_ls_extinction_method     none
_refine_ls_extinction_coef     ?
loop_
    _atom_type_symbol
    _atom_type_description
    _atom_type_scat_dispersion_real
    _atom_type_scat_dispersion_imag
    _atom_type_scat_source
    'C' 'C' 0.0033 0.0016
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'H' 'H' 0.0000 0.0000
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'N' 'N' 0.0061 0.0033
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'O' 'O' 0.0106 0.0060
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
    'Br' 'Br' -0.2901 2.4595
                         'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
_computing_data_collection     'SMART (Bruker, 1997)'
_computing_cell_refinement     'SAINT (Bruker, 1997)'
_computing_data_reduction     'SAINT'
_computing_structure_solution     'SHELXS97 (Sheldrick, 1997)'
_computing_structure_refinement     'SHELXL97 (Sheldrick, 1997)'
_computing_molecular_graphics
;
ORTEPIII (Burnett & Johnson, 1996), ORTEP-3 for Windows (Farrugia,
1997) and
PLATON (Spek, 2003)
;
_computing_publication_material     'SHELXL97'
loop_
    _atom_site_type_symbol
    _atom_site_label
    _atom_site_fract_x
    _atom_site_fract_y
    _atom_site_fract_z
    _atom_site_U_iso_or_equiv
    _atom_site_adp_type
    _atom_site_calc_flag
    _atom_site_refinement_flags
    _atom_site_occupancy
    _atom_site_disorder_assembly
    _atom_site_disorder_group
    Br Br1 0.11210(7) 0.92243(5) 0.38589(6) 0.0615(2) Uani d . 1 . .
    Br Br2 0.22475(12) 0.75878(7) -0.04472(7) 0.0909(3) Uani d . 1 . .
    N N1 0.8470(6) 0.3228(4) 0.3643(4) 0.0445(11) Uani d . 1 . .
    H H1 0.904(8) 0.388(5) 0.405(5) 0.053 Uiso d . 1 . .
    N N2 0.5887(5) 0.1767(4) 0.2816(4) 0.0459(10) Uani d . 1 . .
    O O1 0.8064(4) 0.5665(3) 0.4319(3) 0.0473(9) Uani d . 1 . .
    O O2 0.2955(6) 0.2177(3) 0.0964(3) 0.0669(12) Uani d . 1 . .
    O O3 0.2102(9) 0.1289(4) -0.0866(4) 0.121(2) Uani d . 1 . .
    C C1 0.6565(6) 0.3019(4) 0.3296(4) 0.0346(10) Uani d . 1 . .
    C C2 0.9211(7) 0.2063(5) 0.3468(5) 0.0569(14) Uani d . 1 . .
    H H2A 0.9879 0.1942 0.4175 0.068 Uiso calc R 1 . .
    H H2B 1.0075 0.2062 0.3017 0.068 Uiso calc R 1 . .
    C C3 0.7435(8) 0.1057(5) 0.2862(5) 0.0583(15) Uani d . 1 . .
    H H3A 0.7447 0.0616 0.2116 0.070 Uiso calc R 1 . .
    H H3B 0.7313 0.0445 0.3269 0.070 Uiso calc R 1 . .
    C C4 0.5481(6) 0.3957(4) 0.3401(4) 0.0343(10) Uani d . 1 . .
    H H4 0.4154 0.3720 0.3129 0.041 Uiso calc R 1 . .
    C C5 0.6293(6) 0.5236(4) 0.3895(4) 0.0312(10) Uani d . 1 . .
    C C6 0.4998(6) 0.6184(4) 0.3882(3) 0.0289(9) Uani d . 1 . .
    C C7 0.3073(6) 0.5882(4) 0.3806(3) 0.0318(10) Uani d . 1 . .
    H H7 0.2549 0.5059 0.3755 0.038 Uiso calc R 1 . .
    C C8 0.1921(6) 0.6777(4) 0.3803(4) 0.0355(11) Uani d . 1 . .
    H H8 0.0641 0.6568 0.3764 0.043 Uiso calc R 1 . .
    C C9 0.2711(6) 0.7988(4) 0.3861(4) 0.0361(11) Uani d . 1 . .
    C C10 0.4601(6) 0.8321(4) 0.3943(4) 0.0405(12) Uani d . 1 . .
    H H10 0.5111 0.9142 0.3980 0.049 Uiso calc R 1 . .
    C C11 0.5735(6) 0.7422(4) 0.3969(4) 0.0388(11) Uani d . 1 . .
    H H11 0.7028 0.7652 0.4046 0.047 Uiso calc R 1 . .
    C C12 0.3886(8) 0.1157(5) 0.2361(5) 0.0628(16) Uani d . 1 . .
    H H12A 0.3151 0.1671 0.2748 0.075 Uiso calc R 1 . .
    H H12B 0.3738 0.0342 0.2505 0.075 Uiso calc R 1 . .
    C C13 0.3079(9) 0.0958(5) 0.1128(6) 0.079(2) Uani d . 1 . .
    H H13A 0.3906 0.0557 0.0735 0.095 Uiso calc R 1 . .
    H H13B 0.1820 0.0415 0.0843 0.095 Uiso calc R 1 . .
    C C14 0.2466(9) 0.2216(6) -0.0085(6) 0.0720(19) Uani d . 1 . .
    C C15 0.2433(7) 0.3529(5) -0.0155(4) 0.0515(14) Uani d . 1 . .
    C C16 0.2172(8) 0.3767(6) -0.1179(5) 0.0683(17) Uani d . 1 . .
    H H16 0.2028 0.3100 -0.1814 0.082 Uiso calc R 1 . .
    C C17 0.2120(9) 0.4968(6) -0.1280(5) 0.0667(16) Uani d . 1 . .
    H H17 0.1944 0.5119 -0.1971 0.080 Uiso calc R 1 . .
    C C18 0.2339(7) 0.5940(5) -0.0324(5) 0.0540(14) Uani d . 1 . .
    C C19 0.2565(8) 0.5734(5) 0.0685(5) 0.0549(14) Uani d . 1 . .
    H H19 0.2674 0.6401 0.1313 0.066 Uiso calc R 1 . .
    C C20 0.2631(8) 0.4530(5) 0.0773(4) 0.0559(14) Uani d . 1 . .
    H H20 0.2812 0.4391 0.1468 0.067 Uiso calc R 1 . .
loop_
    _atom_site_aniso_label
    _atom_site_aniso_U_11
    _atom_site_aniso_U_22
    _atom_site_aniso_U_33
    _atom_site_aniso_U_12
    _atom_site_aniso_U_13
    _atom_site_aniso_U_23
    Br1 0.0415(3) 0.0467(3) 0.0999(5) 0.0273(2) 0.0168(3) 0.0240(3)
    Br2 0.1142(6) 0.0704(5) 0.0953(6) 0.0032(4) 0.0313(5) 0.0441(4)
    N1 0.032(2) 0.049(3) 0.056(3) 0.0215(19) 0.011(2) 0.017(2)
    N2 0.036(2) 0.037(2) 0.064(3) 0.0206(18) 0.005(2) 0.017(2)
    O1 0.0207(17) 0.0457(19) 0.073(2) 0.0117(14) 0.0064(16) 0.0178(17)
    O2 0.069(3) 0.035(2) 0.067(3) 0.0199(17) -0.021(2) 0.0036(18)
    O3 0.173(6) 0.066(3) 0.070(3) 0.057(3) -0.024(3) -0.023(3)
    C1 0.030(2) 0.043(3) 0.040(3) 0.017(2) 0.011(2) 0.022(2)
    C2 0.044(3) 0.061(3) 0.069(4) 0.036(3) 0.012(3) 0.019(3)
    C3 0.054(3) 0.056(3) 0.084(4) 0.042(3) 0.027(3) 0.034(3)
    C4 0.024(2) 0.044(3) 0.039(3) 0.0146(19) 0.0058(19) 0.021(2)
    C5 0.024(2) 0.042(3) 0.031(2) 0.0128(19) 0.0062(19) 0.017(2)
    C6 0.023(2) 0.036(2) 0.029(2) 0.0089(18) 0.0058(18) 0.0131(19)
    C7 0.024(2) 0.037(2) 0.035(3) 0.0072(18) 0.0079(19) 0.013(2)
    C8 0.022(2) 0.041(3) 0.043(3) 0.0079(19) 0.008(2) 0.012(2)
    C9 0.030(2) 0.037(2) 0.043(3) 0.0172(19) 0.007(2) 0.013(2)
    C10 0.026(2) 0.033(2) 0.064(3) 0.0073(19) 0.012(2) 0.019(2)
    C11 0.024(2) 0.041(3) 0.054(3) 0.0082(19) 0.012(2) 0.017(2)
    C12 0.050(3) 0.037(3) 0.104(5) 0.012(2) 0.015(3) 0.032(3)
    C13 0.060(4) 0.032(3) 0.110(6) 0.008(3) -0.022(4) 0.009(3)
    C14 0.063(4) 0.056(4) 0.063(4) 0.028(3) -0.021(3) -0.009(3)
    C15 0.038(3) 0.054(3) 0.043(3) 0.020(2) -0.008(2) -0.002(3)
    C16 0.065(4) 0.072(4) 0.051(4) 0.020(3) 0.012(3) -0.008(3)
    C17 0.067(4) 0.084(5) 0.050(4) 0.012(3) 0.020(3) 0.021(3)
    C18 0.043(3) 0.061(3) 0.060(4) 0.005(3) 0.014(3) 0.024(3)
    C19 0.062(4) 0.050(3) 0.044(3) 0.015(3) 0.007(3) 0.007(3)
    C20 0.068(4) 0.051(3) 0.039(3) 0.019(3) 0.000(3) 0.010(3)
_geom_special_details
;
 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.
;
loop_
    _geom_bond_atom_site_label_1
    _geom_bond_atom_site_label_2
    _geom_bond_site_symmetry_2
    _geom_bond_distance
    _geom_bond_publ_flag
    Br1 C9 . 1.908(4) ?
    Br2 C18 . 1.886(6) ?
    N1 C1 . 1.331(6) ?
    N1 C2 . 1.452(6) ?
    N1 H1 . 0.78(5) ?
    N2 C1 . 1.346(6) ?
    N2 C12 . 1.447(6) ?
    N2 C3 . 1.459(6) ?
    O1 C5 . 1.258(5) ?
    O2 C14 . 1.324(8) ?
    O2 C13 . 1.434(6) ?
    O3 C14 . 1.194(7) ?
    C1 C4 . 1.387(6) ?
    C2 C3 . 1.503(8) ?
    C2 H2A . 0.9700 ?
    C2 H2B . 0.9700 ?
    C3 H3A . 0.9700 ?
    C3 H3B . 0.9700 ?
    C4 C5 . 1.390(6) ?
    C4 H4 . 0.9300 ?
    C5 C6 . 1.503(6) ?
    C6 C11 . 1.385(6) ?
    C6 C7 . 1.391(5) ?
    C7 C8 . 1.382(6) ?
    C7 H7 . 0.9300 ?
    C8 C9 . 1.378(6) ?
    C8 H8 . 0.9300 ?
    C9 C10 . 1.368(6) ?
    C10 C11 . 1.377(6) ?
    C10 H10 . 0.9300 ?
    C11 H11 . 0.9300 ?
    C12 C13 . 1.499(9) ?
    C12 H12A . 0.9700 ?
    C12 H12B . 0.9700 ?
    C13 H13A . 0.9700 ?
    C13 H13B . 0.9700 ?
    C14 C15 . 1.488(8) ?
    C15 C20 . 1.379(7) ?
    C15 C16 . 1.387(8) ?
    C16 C17 . 1.378(9) ?
    C16 H16 . 0.9300 ?
    C17 C18 . 1.381(8) ?
    C17 H17 . 0.9300 ?
    C18 C19 . 1.355(8) ?
    C19 C20 . 1.377(7) ?
    C19 H19 . 0.9300 ?
    C20 H20 . 0.9300 ?
loop_
    _geom_angle_atom_site_label_1
    _geom_angle_atom_site_label_2
    _geom_angle_atom_site_label_3
    _geom_angle_site_symmetry_1
    _geom_angle_site_symmetry_3
    _geom_angle
    _geom_angle_publ_flag
    C1 N1 C2 . . 112.6(4) ?
    C1 N1 H1 . . 119(4) ?
    C2 N1 H1 . . 125(4) ?
    C1 N2 C12 . . 125.8(4) ?
    C1 N2 C3 . . 111.5(4) ?
    C12 N2 C3 . . 122.6(4) ?
    C14 O2 C13 . . 116.7(5) ?
    N1 C1 N2 . . 109.0(4) ?
    N1 C1 C4 . . 124.7(4) ?
    N2 C1 C4 . . 126.3(4) ?
    N1 C2 C3 . . 103.2(4) ?
    N1 C2 H2A . . 111.1 ?
    C3 C2 H2A . . 111.1 ?
    N1 C2 H2B . . 111.1 ?
    C3 C2 H2B . . 111.1 ?
    H2A C2 H2B . . 109.1 ?
    N2 C3 C2 . . 103.6(4) ?
    N2 C3 H3A . . 111.0 ?
    C2 C3 H3A . . 111.0 ?
    N2 C3 H3B . . 111.0 ?
    C2 C3 H3B . . 111.0 ?
    H3A C3 H3B . . 109.0 ?
    C1 C4 C5 . . 122.9(4) ?
    C1 C4 H4 . . 118.6 ?
    C5 C4 H4 . . 118.6 ?
    O1 C5 C4 . . 124.2(4) ?
    O1 C5 C6 . . 117.2(4) ?
    C4 C5 C6 . . 118.6(4) ?
    C11 C6 C7 . . 117.7(4) ?
    C11 C6 C5 . . 119.4(4) ?
    C7 C6 C5 . . 122.9(4) ?
    C8 C7 C6 . . 121.5(4) ?
    C8 C7 H7 . . 119.2 ?
    C6 C7 H7 . . 119.2 ?
    C9 C8 C7 . . 118.5(4) ?
    C9 C8 H8 . . 120.7 ?
    C7 C8 H8 . . 120.7 ?
    C10 C9 C8 . . 121.6(4) ?
    C10 C9 Br1 . . 119.9(3) ?
    C8 C9 Br1 . . 118.5(3) ?
    C9 C10 C11 . . 119.0(4) ?
    C9 C10 H10 . . 120.5 ?
    C11 C10 H10 . . 120.5 ?
    C10 C11 C6 . . 121.6(4) ?
    C10 C11 H11 . . 119.2 ?
    C6 C11 H11 . . 119.2 ?
    N2 C12 C13 . . 113.7(5) ?
    N2 C12 H12A . . 108.8 ?
    C13 C12 H12A . . 108.8 ?
    N2 C12 H12B . . 108.8 ?
    C13 C12 H12B . . 108.8 ?
    H12A C12 H12B . . 107.7 ?
    O2 C13 C12 . . 107.6(4) ?
    O2 C13 H13A . . 110.2 ?
    C12 C13 H13A . . 110.2 ?
    O2 C13 H13B . . 110.2 ?
    C12 C13 H13B . . 110.2 ?
    H13A C13 H13B . . 108.5 ?
    O3 C14 O2 . . 122.6(6) ?
    O3 C14 C15 . . 125.3(6) ?
    O2 C14 C15 . . 112.1(5) ?
    C20 C15 C16 . . 118.2(5) ?
    C20 C15 C14 . . 121.9(5) ?
    C16 C15 C14 . . 119.9(5) ?
    C17 C16 C15 . . 121.6(5) ?
    C17 C16 H16 . . 119.2 ?
    C15 C16 H16 . . 119.2 ?
    C16 C17 C18 . . 117.9(6) ?
    C16 C17 H17 . . 121.1 ?
    C18 C17 H17 . . 121.1 ?
    C19 C18 C17 . . 121.9(5) ?
    C19 C18 Br2 . . 119.6(4) ?
    C17 C18 Br2 . . 118.5(4) ?
    C18 C19 C20 . . 119.5(5) ?
    C18 C19 H19 . . 120.3 ?
    C20 C19 H19 . . 120.3 ?
    C19 C20 C15 . . 120.9(5) ?
    C19 C20 H20 . . 119.6 ?
    C15 C20 H20 . . 119.6 ?
loop_
    _geom_hbond_atom_site_label_D
    _geom_hbond_atom_site_label_H
    _geom_hbond_atom_site_label_A
    _geom_hbond_site_symmetry_A
    _geom_hbond_distance_DH
    _geom_hbond_distance_HA
    _geom_hbond_distance_DA
    _geom_hbond_angle_DHA
    N1 H1 O1 . 0.78(5) 2.16(5) 2.706(5) 128(5)
    N1 H1 O1 2_766 0.78(5) 2.48(6) 3.020(5) 128(5)
    C3 H3A O3 2_655 0.97 2.43 3.296(7) 147.7
    C8 H8 O1 1_455 0.93 2.40 3.264(5) 154.1
    C19 H19 Cg1 . 0.93 3.07 3.841(6) 141.4
data_global
_journal_date_recd_electronic     2007-05-20
_journal_date_accepted     2007-05-28
_journal_name_full     'Acta Crystallographica, Section E'
_journal_year     2007
_journal_volume     63
_journal_issue      7
_journal_page_first     o3057
_journal_page_last     o3057
_journal_paper_category     QO
_journal_coeditor_code     DN2178
_publ_contact_author_name     'Professor Chu-Yi Yu'
_publ_contact_author_address
;
Beijing National Laboratory for Molecular Science (BNLMS)
Laboratory for Chemical Biology
Institute of Chemistry
Chinese Academy of Sciences
Beijing 100080
People's Republic of China
;
_publ_contact_author_email     yucy@iccas.ac.cn
_publ_contact_author_fax     '+86 10 62554449'
_publ_contact_author_phone     '+86 10 62610366'
_publ_section_title
;
(E)-2-[2-(4-Bromobenzoylmethylene)imidazolidin-1-yl]ethyl
4-bromobenzoate
;
loop_
    _publ_author_name
    _publ_author_address
    'Chu-Yi Yu'
;
Beijing National Laboratory for Molecular Science (BNLMS)
Laboratory for Chemical Biology
Institute of Chemistry
Chinese Academy of Sciences
Beijing 100080
People's Republic of China
;
    'Xue-Ning Yuan'
;
Graduate University of the Chinese Academy of Sciences
Beijing 100080
People's Republic of China
;
    'Li-Ben Wang'
;
Beijing National Laboratory for Molecular Science (BNLMS)
Laboratory for Chemical Biology
Institute of Chemistry
Chinese Academy of Sciences
Beijing 100080
People's Republic of China
;
    'Zhi-Tang Huang'
;
Beijing National Laboratory for Molecular Science (BNLMS)
Laboratory for Chemical Biology
Institute of Chemistry
Chinese Academy of Sciences
Beijing 100080
People's Republic of China
;
