# Electronic Supplementary Material (ESI) for Chemical Communications # This journal is © The Royal Society of Chemistry 2011 data_global _journal_name_full Chem.Commun. _journal_coden_cambridge 0182 _journal_year ? _journal_volume ? _journal_page_first ? loop_ _publ_author_name 'Tian-Lin Liu' 'Hai Ma' 'Fa-Guang Zhang' 'Yan Zheng' 'Jing Nie' ; Jun-An Ma ; _publ_contact_author_name 'Tian-Lin Liu' _publ_contact_author_email hollandtian@gmail.com data_110524 _database_code_depnum_ccdc_archive 'CCDC 830329' #TrackingRef '- 110524.cif' _audit_creation_method SHELXL-97 _chemical_name_systematic ; ? ; _chemical_name_common ? _chemical_melting_point ? _chemical_formula_moiety ? _chemical_formula_sum 'C25 H16 Br N O4' _chemical_formula_weight 474.30 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' _symmetry_cell_setting ORTHORHOMBIC _symmetry_space_group_name_H-M P2(1)2(1)2(1) loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, -y, z+1/2' '-x, y+1/2, -z+1/2' 'x+1/2, -y+1/2, -z' _cell_length_a 7.0214(6) _cell_length_b 16.2366(16) _cell_length_c 19.0401(18) _cell_angle_alpha 90.00 _cell_angle_beta 90.00 _cell_angle_gamma 90.00 _cell_volume 2170.6(3) _cell_formula_units_Z 4 _cell_measurement_temperature 294(2) _cell_measurement_reflns_used 4778 _cell_measurement_theta_min 3.2 _cell_measurement_theta_max 27.5 _exptl_crystal_description BLOCK _exptl_crystal_colour YELLOW _exptl_crystal_size_max 0.60 _exptl_crystal_size_mid 0.32 _exptl_crystal_size_min 0.28 _exptl_crystal_density_meas ? _exptl_crystal_density_diffrn 1.451 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 960 _exptl_absorpt_coefficient_mu 1.925 _exptl_absorpt_correction_type MULTI-SCAN _exptl_absorpt_correction_T_min 0.3913 _exptl_absorpt_correction_T_max 0.6147 _exptl_absorpt_process_details 'REQAB Spherical 4,3' _exptl_special_details ; ? ; _diffrn_ambient_temperature 294(2) _diffrn_radiation_wavelength 0.71073 _diffrn_radiation_type MoK\a _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_monochromator graphite _diffrn_measurement_device_type RigakuMercury375R _diffrn_measurement_method 'profile data from \w-scans' _diffrn_detector_area_resol_mean 13.6612 _diffrn_standards_number ? _diffrn_standards_interval_count ? _diffrn_standards_interval_time ? _diffrn_standards_decay_% ? _diffrn_reflns_number 22562 _diffrn_reflns_av_R_equivalents 0.0761 _diffrn_reflns_av_sigmaI/netI 0.0509 _diffrn_reflns_limit_h_min -9 _diffrn_reflns_limit_h_max 9 _diffrn_reflns_limit_k_min -21 _diffrn_reflns_limit_k_max 20 _diffrn_reflns_limit_l_min -24 _diffrn_reflns_limit_l_max 24 _diffrn_reflns_theta_min 3.16 _diffrn_reflns_theta_max 27.50 _reflns_number_total 4940 _reflns_number_gt 3161 _reflns_threshold_expression >2sigma(I) _computing_data_collection CrystalClear _computing_cell_refinement CrystalClear _computing_data_reduction CrystalClear _computing_structure_solution 'SHELXS-97 (Sheldrick, 1990)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_molecular_graphics 'Bruker SHELXTL' _computing_publication_material 'Bruker SHELXTL' _refine_special_details ; Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ > 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. ; _refine_ls_structure_factor_coef Fsqd _refine_ls_matrix_type full _refine_ls_weighting_scheme calc _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.0554P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _atom_sites_solution_hydrogens geom _refine_ls_hydrogen_treatment CONSTR _refine_ls_extinction_method none _refine_ls_extinction_coef ? _refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881' _refine_ls_abs_structure_Flack -0.047(9) _refine_ls_number_reflns 4940 _refine_ls_number_parameters 281 _refine_ls_number_restraints 0 _refine_ls_R_factor_all 0.0612 _refine_ls_R_factor_gt 0.0435 _refine_ls_wR_factor_ref 0.1187 _refine_ls_wR_factor_gt 0.1104 _refine_ls_goodness_of_fit_ref 1.012 _refine_ls_restrained_S_all 1.012 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 loop_ _atom_site_label _atom_site_type_symbol _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv _atom_site_adp_type _atom_site_occupancy _atom_site_symmetry_multiplicity _atom_site_calc_flag _atom_site_refinement_flags _atom_site_disorder_assembly _atom_site_disorder_group C1 C 0.7945(5) 0.25330(19) 0.23364(16) 0.0694(8) Uani 1 1 d . . . C2 C 0.7184(7) 0.1818(2) 0.2056(2) 0.0855(10) Uani 1 1 d . . . H2 H 0.7863 0.1523 0.1720 0.103 Uiso 1 1 calc R . . C3 C 0.5454(8) 0.1548(2) 0.2269(2) 0.0995(14) Uani 1 1 d . . . H3 H 0.4935 0.1074 0.2073 0.119 Uiso 1 1 calc R . . C4 C 0.4461(6) 0.1973(2) 0.2775(2) 0.0886(11) Uani 1 1 d . . . H4 H 0.3300 0.1776 0.2939 0.106 Uiso 1 1 calc R . . C5 C 0.5217(5) 0.26962(18) 0.30357(18) 0.0737(8) Uani 1 1 d . . . H5 H 0.4518 0.2995 0.3363 0.088 Uiso 1 1 calc R . . C6 C 0.6970(4) 0.29912(17) 0.28291(14) 0.0600(7) Uani 1 1 d . . . C7 C 0.7747(5) 0.37662(17) 0.31879(14) 0.0607(7) Uani 1 1 d . . . C8 C 0.9266(5) 0.3535(2) 0.37278(16) 0.0762(9) Uani 1 1 d . . . H8A H 1.0263 0.3229 0.3501 0.114 Uiso 1 1 calc R . . H8B H 0.8703 0.3203 0.4090 0.114 Uiso 1 1 calc R . . H8C H 0.9788 0.4027 0.3931 0.114 Uiso 1 1 calc R . . C9 C 0.6228(5) 0.42437(19) 0.35340(17) 0.0684(8) Uani 1 1 d . . . C10 C 0.5067(5) 0.46216(18) 0.38450(16) 0.0703(9) Uani 1 1 d . . . C11 C 0.3639(5) 0.50560(19) 0.41733(18) 0.0719(8) Uani 1 1 d . . . C12 C 0.2411(6) 0.5431(2) 0.44645(17) 0.0733(9) Uani 1 1 d . . . C13 C 0.0920(6) 0.58908(18) 0.47908(18) 0.0726(9) Uani 1 1 d . . . C14 C -0.0826(7) 0.5960(3) 0.4464(3) 0.1001(13) Uani 1 1 d . . . H14 H -0.1053 0.5696 0.4039 0.120 Uiso 1 1 calc R . . C15 C -0.2226(8) 0.6426(3) 0.4776(3) 0.1216(17) Uani 1 1 d . . . H15 H -0.3394 0.6488 0.4551 0.146 Uiso 1 1 calc R . . C16 C -0.1930(10) 0.6801(3) 0.5409(3) 0.1194(18) Uani 1 1 d . . . H16 H -0.2892 0.7110 0.5616 0.143 Uiso 1 1 calc R . . C17 C -0.0237(11) 0.6717(3) 0.5729(3) 0.1223(18) Uani 1 1 d . . . H17 H -0.0030 0.6970 0.6161 0.147 Uiso 1 1 calc R . . C18 C 0.1194(7) 0.6262(2) 0.5425(2) 0.0929(12) Uani 1 1 d . . . H18 H 0.2357 0.6207 0.5654 0.112 Uiso 1 1 calc R . . C19 C 0.7798(4) 0.46377(18) 0.21542(15) 0.0602(7) Uani 1 1 d . . . C20 C 0.9081(4) 0.51156(17) 0.16908(15) 0.0595(7) Uani 1 1 d . . . C21 C 1.1042(5) 0.5136(2) 0.18008(16) 0.0734(8) Uani 1 1 d . . . H21 H 1.1578 0.4851 0.2176 0.088 Uiso 1 1 calc R . . C22 C 1.2179(6) 0.5578(2) 0.13515(17) 0.0765(9) Uani 1 1 d . . . H22 H 1.3491 0.5590 0.1416 0.092 Uiso 1 1 calc R . . C23 C 1.1369(5) 0.6000(2) 0.08104(16) 0.0665(8) Uani 1 1 d . . . C24 C 0.9440(6) 0.6002(2) 0.06964(17) 0.0791(10) Uani 1 1 d . . . H24 H 0.8915 0.6309 0.0333 0.095 Uiso 1 1 calc R . . C25 C 0.8299(5) 0.5538(2) 0.11305(17) 0.0745(9) Uani 1 1 d . . . H25 H 0.6995 0.5510 0.1047 0.089 Uiso 1 1 calc R . . N1 N 1.2626(6) 0.6470(2) 0.03356(15) 0.0820(8) Uani 1 1 d . . . O1 O 0.8754(3) 0.43097(12) 0.27018(10) 0.0633(5) Uani 1 1 d . . . O2 O 0.6116(3) 0.45594(14) 0.20696(13) 0.0734(6) Uani 1 1 d . . . O3 O 1.4356(5) 0.6387(3) 0.04038(16) 0.1227(12) Uani 1 1 d . . . O4 O 1.1853(5) 0.68916(17) -0.01193(17) 0.1118(10) Uani 1 1 d . . . Br1 Br 1.04053(6) 0.28106(3) 0.19901(2) 0.10317(19) Uani 1 1 d . . . loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_23 _atom_site_aniso_U_13 _atom_site_aniso_U_12 C1 0.082(2) 0.0614(16) 0.0645(16) -0.0001(14) -0.0114(17) 0.0116(16) C2 0.117(3) 0.0670(19) 0.0723(19) -0.0110(18) -0.012(2) 0.014(2) C3 0.143(4) 0.062(2) 0.093(3) 0.0060(19) -0.029(3) -0.013(3) C4 0.095(3) 0.0636(19) 0.108(3) 0.0179(19) -0.017(2) -0.0120(19) C5 0.0759(19) 0.0615(17) 0.084(2) 0.0047(16) -0.0060(19) 0.0023(16) C6 0.0654(16) 0.0558(15) 0.0589(15) 0.0034(12) -0.0102(14) 0.0058(13) C7 0.0663(17) 0.0609(15) 0.0549(15) 0.0032(13) -0.0022(14) 0.0046(14) C8 0.086(2) 0.081(2) 0.0616(17) 0.0063(15) -0.0222(17) 0.0027(19) C9 0.082(2) 0.0604(16) 0.0628(16) 0.0011(15) 0.0029(17) -0.0021(17) C10 0.090(2) 0.0568(16) 0.0641(17) 0.0021(14) 0.0140(18) 0.0025(17) C11 0.088(2) 0.0602(17) 0.0678(18) 0.0080(15) 0.0102(18) -0.0007(17) C12 0.095(3) 0.0565(16) 0.0684(18) 0.0078(15) 0.017(2) 0.0051(18) C13 0.090(3) 0.0551(16) 0.0723(19) 0.0053(15) 0.0212(18) 0.0023(16) C14 0.095(3) 0.092(3) 0.114(3) -0.016(2) 0.007(3) 0.007(2) C15 0.091(3) 0.103(3) 0.171(5) -0.011(3) 0.030(3) 0.010(3) C16 0.133(4) 0.087(3) 0.137(4) -0.003(3) 0.065(4) 0.016(3) C17 0.169(5) 0.107(3) 0.091(3) -0.014(2) 0.044(4) 0.024(4) C18 0.121(3) 0.085(2) 0.072(2) -0.0010(19) 0.021(2) 0.017(2) C19 0.0596(16) 0.0658(16) 0.0553(15) 0.0018(13) -0.0024(14) 0.0066(14) C20 0.0664(17) 0.0582(15) 0.0541(14) -0.0053(13) 0.0000(13) 0.0018(14) C21 0.0662(17) 0.090(2) 0.0639(18) 0.0104(17) -0.0103(15) -0.0105(17) C22 0.070(2) 0.092(2) 0.0667(18) -0.0012(18) -0.0028(17) -0.0230(19) C23 0.080(2) 0.0625(17) 0.0573(16) -0.0066(14) 0.0133(16) -0.0051(16) C24 0.083(2) 0.091(2) 0.0627(18) 0.0133(17) 0.0107(18) 0.022(2) C25 0.0613(18) 0.098(2) 0.0638(18) 0.0142(17) 0.0018(16) 0.0107(18) N1 0.100(2) 0.0813(19) 0.0647(16) -0.0063(15) 0.0142(17) -0.0111(18) O1 0.0601(11) 0.0699(12) 0.0600(10) 0.0071(10) -0.0060(10) -0.0008(10) O2 0.0574(11) 0.0867(13) 0.0762(13) 0.0181(12) -0.0047(12) 0.0009(10) O3 0.091(2) 0.183(3) 0.0945(19) 0.016(2) 0.0125(17) -0.048(2) O4 0.136(3) 0.0891(17) 0.110(2) 0.0271(17) 0.033(2) 0.0084(18) Br1 0.0829(3) 0.1208(3) 0.1057(3) -0.0185(3) 0.0124(2) 0.0249(2) _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_distance _geom_bond_site_symmetry_2 _geom_bond_publ_flag C1 C6 1.379(4) . ? C1 C2 1.386(5) . ? C1 Br1 1.903(4) . ? C2 C3 1.354(6) . ? C2 H2 0.9300 . ? C3 C4 1.375(6) . ? C3 H3 0.9300 . ? C4 C5 1.381(5) . ? C4 H4 0.9300 . ? C5 C6 1.378(4) . ? C5 H5 0.9300 . ? C6 C7 1.532(4) . ? C7 O1 1.461(3) . ? C7 C9 1.474(5) . ? C7 C8 1.528(4) . ? C8 H8A 0.9600 . ? C8 H8B 0.9600 . ? C8 H8C 0.9600 . ? C9 C10 1.180(4) . ? C10 C11 1.376(5) . ? C11 C12 1.192(5) . ? C12 C13 1.428(5) . ? C13 C18 1.363(5) . ? C13 C14 1.379(6) . ? C14 C15 1.375(6) . ? C14 H14 0.9300 . ? C15 C16 1.366(8) . ? C15 H15 0.9300 . ? C16 C17 1.343(8) . ? C16 H16 0.9300 . ? C17 C18 1.375(7) . ? C17 H17 0.9300 . ? C18 H18 0.9300 . ? C19 O2 1.199(4) . ? C19 O1 1.349(3) . ? C19 C20 1.480(4) . ? C20 C25 1.382(4) . ? C20 C21 1.394(5) . ? C21 C22 1.373(5) . ? C21 H21 0.9300 . ? C22 C23 1.361(5) . ? C22 H22 0.9300 . ? C23 C24 1.372(5) . ? C23 N1 1.476(4) . ? C24 C25 1.375(5) . ? C24 H24 0.9300 . ? C25 H25 0.9300 . ? N1 O3 1.229(5) . ? N1 O4 1.230(4) . ? loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle _geom_angle_site_symmetry_1 _geom_angle_site_symmetry_3 _geom_angle_publ_flag C6 C1 C2 121.5(4) . . ? C6 C1 Br1 124.0(2) . . ? C2 C1 Br1 114.5(3) . . ? C3 C2 C1 120.1(4) . . ? C3 C2 H2 119.9 . . ? C1 C2 H2 119.9 . . ? C2 C3 C4 120.2(4) . . ? C2 C3 H3 119.9 . . ? C4 C3 H3 119.9 . . ? C3 C4 C5 118.9(4) . . ? C3 C4 H4 120.5 . . ? C5 C4 H4 120.5 . . ? C6 C5 C4 122.4(4) . . ? C6 C5 H5 118.8 . . ? C4 C5 H5 118.8 . . ? C5 C6 C1 116.8(3) . . ? C5 C6 C7 118.4(3) . . ? C1 C6 C7 124.7(3) . . ? O1 C7 C9 108.4(2) . . ? O1 C7 C8 103.7(2) . . ? C9 C7 C8 109.5(3) . . ? O1 C7 C6 112.7(2) . . ? C9 C7 C6 111.9(3) . . ? C8 C7 C6 110.3(2) . . ? C7 C8 H8A 109.5 . . ? C7 C8 H8B 109.5 . . ? H8A C8 H8B 109.5 . . ? C7 C8 H8C 109.5 . . ? H8A C8 H8C 109.5 . . ? H8B C8 H8C 109.5 . . ? C10 C9 C7 176.3(4) . . ? C9 C10 C11 176.5(4) . . ? C12 C11 C10 179.3(4) . . ? C11 C12 C13 178.0(4) . . ? C18 C13 C14 119.3(4) . . ? C18 C13 C12 120.9(4) . . ? C14 C13 C12 119.9(3) . . ? C15 C14 C13 119.1(5) . . ? C15 C14 H14 120.5 . . ? C13 C14 H14 120.5 . . ? C16 C15 C14 121.1(6) . . ? C16 C15 H15 119.4 . . ? C14 C15 H15 119.4 . . ? C17 C16 C15 119.4(5) . . ? C17 C16 H16 120.3 . . ? C15 C16 H16 120.3 . . ? C16 C17 C18 120.6(5) . . ? C16 C17 H17 119.7 . . ? C18 C17 H17 119.7 . . ? C13 C18 C17 120.5(5) . . ? C13 C18 H18 119.7 . . ? C17 C18 H18 119.7 . . ? O2 C19 O1 123.5(3) . . ? O2 C19 C20 125.1(3) . . ? O1 C19 C20 111.4(2) . . ? C25 C20 C21 119.8(3) . . ? C25 C20 C19 118.6(3) . . ? C21 C20 C19 121.6(3) . . ? C22 C21 C20 119.5(3) . . ? C22 C21 H21 120.2 . . ? C20 C21 H21 120.2 . . ? C23 C22 C21 119.5(3) . . ? C23 C22 H22 120.3 . . ? C21 C22 H22 120.3 . . ? C22 C23 C24 122.2(3) . . ? C22 C23 N1 118.3(3) . . ? C24 C23 N1 119.5(3) . . ? C23 C24 C25 118.6(3) . . ? C23 C24 H24 120.7 . . ? C25 C24 H24 120.7 . . ? C24 C25 C20 120.3(3) . . ? C24 C25 H25 119.9 . . ? C20 C25 H25 119.9 . . ? O3 N1 O4 124.9(4) . . ? O3 N1 C23 118.0(3) . . ? O4 N1 C23 117.1(4) . . ? C19 O1 C7 119.2(2) . . ? loop_ _geom_torsion_atom_site_label_1 _geom_torsion_atom_site_label_2 _geom_torsion_atom_site_label_3 _geom_torsion_atom_site_label_4 _geom_torsion _geom_torsion_site_symmetry_1 _geom_torsion_site_symmetry_2 _geom_torsion_site_symmetry_3 _geom_torsion_site_symmetry_4 _geom_torsion_publ_flag C6 C1 C2 C3 -0.7(5) . . . . ? Br1 C1 C2 C3 178.9(3) . . . . ? C1 C2 C3 C4 -1.3(6) . . . . ? C2 C3 C4 C5 3.0(6) . . . . ? C3 C4 C5 C6 -2.8(5) . . . . ? C4 C5 C6 C1 0.8(5) . . . . ? C4 C5 C6 C7 -175.6(3) . . . . ? C2 C1 C6 C5 1.0(4) . . . . ? Br1 C1 C6 C5 -178.6(2) . . . . ? C2 C1 C6 C7 177.2(3) . . . . ? Br1 C1 C6 C7 -2.4(4) . . . . ? C5 C6 C7 O1 -142.0(3) . . . . ? C1 C6 C7 O1 41.9(4) . . . . ? C5 C6 C7 C9 -19.5(4) . . . . ? C1 C6 C7 C9 164.3(3) . . . . ? C5 C6 C7 C8 102.6(3) . . . . ? C1 C6 C7 C8 -73.5(4) . . . . ? O1 C7 C9 C10 -112(5) . . . . ? C8 C7 C9 C10 0(5) . . . . ? C6 C7 C9 C10 123(5) . . . . ? C7 C9 C10 C11 -166(4) . . . . ? C9 C10 C11 C12 160(100) . . . . ? C10 C11 C12 C13 165(100) . . . . ? C11 C12 C13 C18 -142(11) . . . . ? C11 C12 C13 C14 39(11) . . . . ? C18 C13 C14 C15 2.2(6) . . . . ? C12 C13 C14 C15 -178.0(4) . . . . ? C13 C14 C15 C16 -1.7(8) . . . . ? C14 C15 C16 C17 0.6(8) . . . . ? C15 C16 C17 C18 0.2(9) . . . . ? C14 C13 C18 C17 -1.5(6) . . . . ? C12 C13 C18 C17 178.7(4) . . . . ? C16 C17 C18 C13 0.3(8) . . . . ? O2 C19 C20 C25 2.9(5) . . . . ? O1 C19 C20 C25 -175.7(3) . . . . ? O2 C19 C20 C21 -176.0(3) . . . . ? O1 C19 C20 C21 5.4(4) . . . . ? C25 C20 C21 C22 0.2(5) . . . . ? C19 C20 C21 C22 179.1(3) . . . . ? C20 C21 C22 C23 0.8(5) . . . . ? C21 C22 C23 C24 0.2(5) . . . . ? C21 C22 C23 N1 -180.0(3) . . . . ? C22 C23 C24 C25 -2.2(6) . . . . ? N1 C23 C24 C25 177.9(3) . . . . ? C23 C24 C25 C20 3.2(6) . . . . ? C21 C20 C25 C24 -2.3(5) . . . . ? C19 C20 C25 C24 178.8(3) . . . . ? C22 C23 N1 O3 7.8(5) . . . . ? C24 C23 N1 O3 -172.3(4) . . . . ? C22 C23 N1 O4 -175.1(3) . . . . ? C24 C23 N1 O4 4.7(5) . . . . ? O2 C19 O1 C7 5.9(4) . . . . ? C20 C19 O1 C7 -175.5(2) . . . . ? C9 C7 O1 C19 -63.0(3) . . . . ? C8 C7 O1 C19 -179.3(2) . . . . ? C6 C7 O1 C19 61.4(3) . . . . ? _diffrn_measured_fraction_theta_max 0.991 _diffrn_reflns_theta_full 27.50 _diffrn_measured_fraction_theta_full 0.991 _refine_diff_density_max 0.318 _refine_diff_density_min -0.497 _refine_diff_density_rms 0.045