# Supplementary Material (ESI) for Chemical Communications # This journal is (c) The Royal Society of Chemistry 2009 data_global _journal_name_full Chem.Commun. _journal_coden_Cambridge 0182 _journal_volume ? _journal_page_first ? _journal_year ? _publ_contact_author_name 'Bernhard Witulski' _publ_contact_author_email BERNHARD.WITULSKI@ENSICAEN.FR _publ_section_title ; First total synthesis of antiostatin A1 a potent carbazole-based naturally occuring antioxidant ; loop_ _publ_author_name 'Bernhard Witulski' 'Carole Alayrac' 'Dieter Schollmeyer' # Attachment 'ca403.cif' data_ca403 _database_code_depnum_ccdc_archive 'CCDC 709652' _audit_creation_method SHELXL-97 _chemical_name_systematic ? _chemical_name_common 'Antiostatin A1' _chemical_formula_moiety 'C20 H24 N2 O2' _chemical_formula_sum 'C20 H24 N2 O2' _chemical_compound_source synthetic _exptl_crystal_recrystallization_method 'ethyl acetate and pentane' _chemical_melting_point 490 _exptl_crystal_description needle _exptl_crystal_colour colourless _diffrn_ambient_temperature 193(2) _chemical_formula_weight 324.41 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' _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M 'P 21/n' _symmetry_int_tables_number 14 _chemical_absolute_configuration ? _symmetry_space_group_name_Hall '-P 2yn' loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x+1/2, y+1/2, -z+1/2' '-x, -y, -z' 'x-1/2, -y-1/2, z-1/2' _cell_length_a 4.9084(2) _cell_length_b 24.3209(12) _cell_length_c 14.3390(8) _cell_angle_alpha 90.00 _cell_angle_beta 90.069(3) _cell_angle_gamma 90.00 _cell_volume 1711.74(15) _cell_formula_units_Z 4 _cell_measurement_temperature 193(2) _cell_measurement_reflns_used 2220 _cell_measurement_theta_min 2.1 _cell_measurement_theta_max 23.6 _exptl_crystal_size_max 0.25 _exptl_crystal_size_mid 0.16 _exptl_crystal_size_min 0.05 _exptl_crystal_density_meas ? _exptl_crystal_density_diffrn 1.259 _exptl_crystal_density_method 'not measured' _exptl_crystal_F_000 696 _exptl_absorpt_coefficient_mu 0.082 _exptl_absorpt_correction_type none #_exptl_absorpt_correction_T_min 0.9799 #_exptl_absorpt_correction_T_max 0.9959 #_exptl_absorpt_process_details 'Corinc (Dr\"ager, 1971)' _exptl_special_details ; ? ; _diffrn_radiation_probe ? _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71069 _diffrn_source 'sealed Tube' _diffrn_radiation_monochromator graphite _diffrn_measurement_device_type 'SMART CCD' _diffrn_measurement_device '\k-geometry diffractometer' _diffrn_measurement_method 'CCD scan' _diffrn_detector_area_resol_mean ? _diffrn_standards_number ? _diffrn_standards_interval_count ? _diffrn_standards_interval_time ? _diffrn_standards_decay_% ? _diffrn_reflns_number 18097 _diffrn_reflns_av_R_equivalents 0.1027 _diffrn_reflns_av_sigmaI/netI 0.1144 _diffrn_reflns_limit_h_min -6 _diffrn_reflns_limit_h_max 6 _diffrn_reflns_limit_k_min -31 _diffrn_reflns_limit_k_max 31 _diffrn_reflns_limit_l_min -18 _diffrn_reflns_limit_l_max 18 _diffrn_reflns_theta_min 1.42 _diffrn_reflns_theta_max 27.90 _reflns_number_total 4085 _reflns_number_gt 2250 _reflns_threshold_expression >2sigma(I) _computing_data_collection 'APEX2 V2.0 (Bruker, 2006)' _computing_cell_refinement 'APEX2 V2.0 (Bruker, 2006)' _computing_data_reduction 'APEX2 V2.0 (Bruker, 2006)' _computing_structure_solution 'SIR-97 (Altomare, 1997)' _computing_structure_refinement 'SHELXL-97 (Sheldrick, 1997)' _computing_molecular_graphics ? _computing_publication_material ? _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^)+(0.0500P)^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_number_reflns 4085 _refine_ls_number_parameters 220 _refine_ls_number_restraints 1 _refine_ls_R_factor_all 0.1064 _refine_ls_R_factor_gt 0.0477 _refine_ls_wR_factor_ref 0.1120 _refine_ls_wR_factor_obs 0.0979 _refine_ls_goodness_of_fit_ref 0.860 _refine_ls_restrained_S_all 0.865 _refine_ls_shift/su_max 0.000 _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 N1 N 0.6915(4) 0.28081(8) 0.29098(14) 0.0276(5) Uani 1 1 d . . . H1 H 0.6871 0.2476 0.3402 0.033 Uiso 1 1 d R . . C2 C 0.8282(5) 0.28042(9) 0.20667(16) 0.0253(5) Uani 1 1 d . . . C3 C 1.0300(5) 0.24341(9) 0.17765(16) 0.0271(6) Uani 1 1 d . . . C4 C 1.1385(5) 0.25155(9) 0.08877(16) 0.0269(6) Uani 1 1 d . . . C5 C 1.0475(5) 0.29594(9) 0.03315(15) 0.0239(5) Uani 1 1 d . . . C6 C 0.8525(5) 0.33301(9) 0.06445(16) 0.0236(5) Uani 1 1 d . . . C7 C 0.7402(5) 0.32545(9) 0.15296(16) 0.0242(5) Uani 1 1 d . . . C8 C 0.5403(5) 0.35452(9) 0.20834(17) 0.0257(5) Uani 1 1 d . . . C9 C 0.3793(5) 0.40193(10) 0.19562(17) 0.0319(6) Uani 1 1 d . . . H9 H 0.3932 0.4229 0.1400 0.038 Uiso 1 1 calc R . . C10 C 0.1999(6) 0.41746(11) 0.26581(18) 0.0387(7) Uani 1 1 d . . . H10 H 0.0913 0.4495 0.2580 0.046 Uiso 1 1 calc R . . C11 C 0.1773(6) 0.38678(11) 0.3474(2) 0.0394(7) Uani 1 1 d . . . H11 H 0.0507 0.3980 0.3938 0.047 Uiso 1 1 calc R . . C12 C 0.3335(5) 0.34066(10) 0.36265(17) 0.0330(6) Uani 1 1 d . . . H12 H 0.3188 0.3202 0.4188 0.040 Uiso 1 1 calc R . . C13 C 0.5138(5) 0.32517(10) 0.29259(16) 0.0267(5) Uani 1 1 d . . . C14 C 1.1208(5) 0.19917(9) 0.24504(18) 0.0334(6) Uani 1 1 d . . . H14A H 1.1336 0.2155 0.3082 0.040 Uiso 1 1 calc R . . H14B H 1.3058 0.1869 0.2271 0.040 Uiso 1 1 calc R . . C15 C 0.9351(5) 0.14878(10) 0.24978(19) 0.0378(7) Uani 1 1 d . . . H15A H 0.9916 0.1260 0.3037 0.045 Uiso 1 1 calc R . . H15B H 0.7466 0.1614 0.2616 0.045 Uiso 1 1 calc R . . C16 C 0.9335(6) 0.11318(11) 0.1645(2) 0.0460(8) Uani 1 1 d . . . H16A H 1.1225 0.1018 0.1500 0.055 Uiso 1 1 calc R . . H16B H 0.8642 0.1348 0.1109 0.055 Uiso 1 1 calc R . . C17 C 0.7579(7) 0.06219(12) 0.1769(2) 0.0638(9) Uani 1 1 d D . . H17A H 0.8201 0.0420 0.2329 0.077 Uiso 1 1 calc R . . H17B H 0.5670 0.0737 0.1876 0.077 Uiso 1 1 calc R . . C18 C 0.7670(11) 0.02393(16) 0.0938(3) 0.125(2) Uani 1 1 d D . . H18A H 0.6560 0.0392 0.0432 0.187 Uiso 1 1 calc R . . H18B H 0.6951 -0.0121 0.1117 0.187 Uiso 1 1 calc R . . H18C H 0.9558 0.0199 0.0727 0.187 Uiso 1 1 calc R . . C19 C 1.3598(5) 0.21477(10) 0.04902(18) 0.0320(6) Uani 1 1 d . . . H19A H 1.4392 0.1926 0.0992 0.048 Uiso 1 1 calc R . . H19B H 1.5021 0.2375 0.0206 0.048 Uiso 1 1 calc R . . H19C H 1.2810 0.1905 0.0016 0.048 Uiso 1 1 calc R . . O20 O 1.1567(3) 0.30033(6) -0.05550(11) 0.0316(4) Uani 1 1 d . . . H20 H 1.1916 0.3421 -0.0605 0.047 Uiso 1 1 d R . . N21 N 0.7595(4) 0.37770(7) 0.00832(13) 0.0255(5) Uani 1 1 d . . . H21 H 0.5913 0.3942 0.0118 0.031 Uiso 1 1 d R . . C22 C 0.9181(5) 0.41383(9) -0.03782(16) 0.0274(6) Uani 1 1 d . . . O23 O 1.1701(3) 0.40856(6) -0.04138(12) 0.0318(4) Uani 1 1 d . . . C24 C 0.7766(5) 0.46041(9) -0.08634(18) 0.0343(7) Uani 1 1 d . . . H24A H 0.8338 0.4953 -0.0585 0.052 Uiso 1 1 calc R . . H24B H 0.5790 0.4562 -0.0796 0.052 Uiso 1 1 calc R . . H24C H 0.8245 0.4601 -0.1527 0.052 Uiso 1 1 calc R . . 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 N1 0.0308(12) 0.0275(11) 0.0244(11) 0.0048(9) 0.0046(10) 0.0016(10) C2 0.0259(13) 0.0274(13) 0.0227(13) -0.0005(10) 0.0018(12) -0.0029(11) C3 0.0254(13) 0.0254(13) 0.0306(15) -0.0023(11) -0.0029(12) -0.0011(11) C4 0.0219(13) 0.0272(13) 0.0316(15) -0.0037(11) 0.0010(12) -0.0014(11) C5 0.0251(13) 0.0260(12) 0.0206(13) -0.0044(10) 0.0034(12) -0.0018(11) C6 0.0248(12) 0.0241(13) 0.0218(12) 0.0005(10) -0.0034(11) -0.0028(11) C7 0.0239(12) 0.0247(12) 0.0239(13) -0.0017(11) -0.0027(11) -0.0007(11) C8 0.0235(12) 0.0299(13) 0.0236(12) -0.0024(11) -0.0010(11) -0.0024(11) C9 0.0341(15) 0.0325(14) 0.0291(14) 0.0020(11) 0.0028(12) 0.0037(12) C10 0.0433(17) 0.0386(15) 0.0341(15) -0.0030(12) 0.0071(14) 0.0134(14) C11 0.0379(15) 0.0440(16) 0.0364(15) -0.0069(13) 0.0112(14) 0.0051(14) C12 0.0355(14) 0.0381(15) 0.0253(14) -0.0001(11) 0.0048(13) -0.0025(13) C13 0.0243(13) 0.0298(13) 0.0260(13) -0.0009(11) 0.0018(12) -0.0043(11) C14 0.0322(14) 0.0323(14) 0.0357(15) 0.0025(12) -0.0020(13) 0.0042(12) C15 0.0318(14) 0.0324(14) 0.0492(17) 0.0104(13) 0.0003(14) 0.0058(13) C16 0.0411(16) 0.0355(16) 0.061(2) -0.0029(14) 0.0016(16) 0.0022(13) C17 0.066(2) 0.055(2) 0.070(2) -0.0018(17) -0.0090(19) -0.0141(18) C18 0.208(6) 0.092(3) 0.075(3) -0.013(2) 0.007(3) -0.069(4) C19 0.0270(13) 0.0339(14) 0.0350(15) -0.0040(12) 0.0001(13) 0.0039(12) O20 0.0376(10) 0.0322(9) 0.0251(9) -0.0031(8) 0.0100(9) 0.0004(8) N21 0.0259(11) 0.0254(10) 0.0251(11) 0.0036(9) 0.0011(9) 0.0028(9) C22 0.0315(15) 0.0288(14) 0.0217(13) -0.0040(11) 0.0006(12) -0.0030(12) O23 0.0248(10) 0.0336(10) 0.0372(10) -0.0003(8) 0.0033(9) -0.0035(8) C24 0.0345(15) 0.0301(14) 0.0385(16) 0.0051(12) 0.0004(13) -0.0009(12) _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 N1 C2 1.383(3) . ? N1 C13 1.387(3) . ? C2 C3 1.402(3) . ? C2 C7 1.406(3) . ? C3 C4 1.396(3) . ? C3 C14 1.513(3) . ? C4 C5 1.414(3) . ? C4 C19 1.519(3) . ? C5 O20 1.384(3) . ? C5 C6 1.390(3) . ? C6 C7 1.397(3) . ? C6 N21 1.427(3) . ? C7 C8 1.447(3) . ? C8 C13 1.409(3) . ? C8 C9 1.410(3) . ? C9 C10 1.390(3) . ? C10 C11 1.393(4) . ? C11 C12 1.376(3) . ? C12 C13 1.392(3) . ? C14 C15 1.529(3) . ? C15 C16 1.498(4) . ? C16 C17 1.521(4) . ? C17 C18 1.512(3) . ? N21 C22 1.348(3) . ? C22 O23 1.245(3) . ? C22 C24 1.499(3) . ? O20 H20 1.0300 . no N1 H1 1.0700 . no N21 H21 0.9200 . no C9 H9 0.9500 . no C10 H10 0.9500 . no C11 H11 0.9500 . no C12 H12 0.9500 . no C14 H14A 0.9900 . no C14 H14B 0.9900 . no C15 H15A 0.9900 . no C15 H15B 0.9900 . no C16 H16A 0.9900 . no C16 H16B 0.9900 . no C17 H17A 0.9900 . no C17 H17B 0.9900 . no C18 H18A 0.9800 . no C18 H18B 0.9800 . no C18 H18C 0.9800 . no C19 H19A 0.9800 . no C19 H19B 0.9800 . no C19 H19C 0.9800 . no C24 H24A 0.9800 . no C24 H24B 0.9800 . no C24 H24C 0.9800 . no 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 C2 N1 C13 108.99(19) . . ? N1 C2 C3 127.4(2) . . ? N1 C2 C7 108.9(2) . . ? C3 C2 C7 123.6(2) . . ? C4 C3 C2 116.8(2) . . ? C4 C3 C14 124.9(2) . . ? C2 C3 C14 118.3(2) . . ? C3 C4 C5 120.2(2) . . ? C3 C4 C19 122.2(2) . . ? C5 C4 C19 117.6(2) . . ? O20 C5 C6 120.9(2) . . ? O20 C5 C4 117.0(2) . . ? C6 C5 C4 122.0(2) . . ? C5 C6 C7 118.7(2) . . ? C5 C6 N21 122.2(2) . . ? C7 C6 N21 119.1(2) . . ? C6 C7 C2 118.6(2) . . ? C6 C7 C8 134.7(2) . . ? C2 C7 C8 106.7(2) . . ? C13 C8 C9 118.2(2) . . ? C13 C8 C7 106.6(2) . . ? C9 C8 C7 135.1(2) . . ? C10 C9 C8 118.9(2) . . ? C9 C10 C11 120.9(2) . . ? C12 C11 C10 121.7(2) . . ? C11 C12 C13 117.5(2) . . ? N1 C13 C12 128.5(2) . . ? N1 C13 C8 108.7(2) . . ? C12 C13 C8 122.8(2) . . ? C3 C14 C15 115.0(2) . . ? C16 C15 C14 115.4(2) . . ? C15 C16 C17 112.2(2) . . ? C18 C17 C16 113.1(3) . . ? C22 N21 C6 126.0(2) . . ? O23 C22 N21 121.8(2) . . ? O23 C22 C24 121.2(2) . . ? N21 C22 C24 116.9(2) . . ? C5 O20 H20 102.00 . . no C13 N1 H1 124.00 . . no C2 N1 H1 125.00 . . no C6 N21 H21 126.00 . . no C22 N21 H21 105.00 . . no C8 C9 H9 120.00 . . no C10 C9 H9 121.00 . . no C9 C10 H10 120.00 . . no C11 C10 H10 120.00 . . no C10 C11 H11 119.00 . . no C12 C11 H11 119.00 . . no C11 C12 H12 121.00 . . no C13 C12 H12 121.00 . . no C3 C14 H14A 108.00 . . no C3 C14 H14B 109.00 . . no C15 C14 H14A 109.00 . . no C15 C14 H14B 108.00 . . no H14A C14 H14B 108.00 . . no C14 C15 H15A 108.00 . . no C14 C15 H15B 108.00 . . no C16 C15 H15A 108.00 . . no C16 C15 H15B 108.00 . . no H15A C15 H15B 108.00 . . no C15 C16 H16A 109.00 . . no C15 C16 H16B 109.00 . . no C17 C16 H16A 109.00 . . no C17 C16 H16B 109.00 . . no H16A C16 H16B 108.00 . . no C16 C17 H17A 109.00 . . no C16 C17 H17B 109.00 . . no C18 C17 H17A 109.00 . . no C18 C17 H17B 109.00 . . no H17A C17 H17B 108.00 . . no C17 C18 H18A 109.00 . . no C17 C18 H18B 109.00 . . no C17 C18 H18C 109.00 . . no H18A C18 H18B 109.00 . . no H18A C18 H18C 110.00 . . no H18B C18 H18C 109.00 . . no C4 C19 H19A 109.00 . . no C4 C19 H19B 110.00 . . no C4 C19 H19C 109.00 . . no H19A C19 H19B 109.00 . . no H19A C19 H19C 110.00 . . no H19B C19 H19C 109.00 . . no C22 C24 H24A 109.00 . . no C22 C24 H24B 109.00 . . no C22 C24 H24C 109.00 . . no H24A C24 H24B 109.00 . . no H24A C24 H24C 109.00 . . no H24B C24 H24C 109.00 . . no 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 C13 N1 C2 C3 178.3(2) . . . . ? C13 N1 C2 C7 0.5(3) . . . . ? N1 C2 C3 C4 -180.0(2) . . . . ? C7 C2 C3 C4 -2.5(3) . . . . ? N1 C2 C3 C14 -2.0(3) . . . . ? C7 C2 C3 C14 175.5(2) . . . . ? C2 C3 C4 C5 1.0(3) . . . . ? C14 C3 C4 C5 -176.9(2) . . . . ? C2 C3 C4 C19 179.5(2) . . . . ? C14 C3 C4 C19 1.6(4) . . . . ? C3 C4 C5 O20 -177.7(2) . . . . ? C19 C4 C5 O20 3.7(3) . . . . ? C3 C4 C5 C6 0.8(3) . . . . ? C19 C4 C5 C6 -177.8(2) . . . . ? O20 C5 C6 C7 177.3(2) . . . . ? C4 C5 C6 C7 -1.1(3) . . . . ? O20 C5 C6 N21 -1.3(3) . . . . ? C4 C5 C6 N21 -179.7(2) . . . . ? C5 C6 C7 C2 -0.3(3) . . . . ? N21 C6 C7 C2 178.3(2) . . . . ? C5 C6 C7 C8 179.5(2) . . . . ? N21 C6 C7 C8 -1.9(4) . . . . ? N1 C2 C7 C6 -179.9(2) . . . . ? C3 C2 C7 C6 2.2(3) . . . . ? N1 C2 C7 C8 0.2(3) . . . . ? C3 C2 C7 C8 -177.7(2) . . . . ? C6 C7 C8 C13 179.3(3) . . . . ? C2 C7 C8 C13 -0.9(3) . . . . ? C6 C7 C8 C9 -0.1(5) . . . . ? C2 C7 C8 C9 179.7(3) . . . . ? C13 C8 C9 C10 -0.6(4) . . . . ? C7 C8 C9 C10 178.7(3) . . . . ? C8 C9 C10 C11 -0.3(4) . . . . ? C9 C10 C11 C12 1.1(4) . . . . ? C10 C11 C12 C13 -0.8(4) . . . . ? C2 N1 C13 C12 178.7(2) . . . . ? C2 N1 C13 C8 -1.1(3) . . . . ? C11 C12 C13 N1 -180.0(2) . . . . ? C11 C12 C13 C8 -0.1(4) . . . . ? C9 C8 C13 N1 -179.3(2) . . . . ? C7 C8 C13 N1 1.2(3) . . . . ? C9 C8 C13 C12 0.9(4) . . . . ? C7 C8 C13 C12 -178.6(2) . . . . ? C4 C3 C14 C15 -100.9(3) . . . . ? C2 C3 C14 C15 81.3(3) . . . . ? C3 C14 C15 C16 69.0(3) . . . . ? C14 C15 C16 C17 176.5(2) . . . . ? C15 C16 C17 C18 -176.5(3) . . . . ? C5 C6 N21 C22 -49.2(3) . . . . ? C7 C6 N21 C22 132.2(2) . . . . ? C6 N21 C22 O23 5.9(4) . . . . ? C6 N21 C22 C24 -175.2(2) . . . . ? loop_ _geom_hbond_atom_site_label_D _geom_hbond_atom_site_label_H _geom_hbond_atom_site_label_A _geom_hbond_distance_DH _geom_hbond_distance_HA _geom_hbond_distance_DA _geom_hbond_angle_DHA _geom_hbond_site_symmetry_A N1 H1 O20 1.07 1.90 2.961(2) 168.6 4_566 O20 H20 O23 1.03 1.64 2.641(2) 161.0 . N21 H21 O23 0.92 2.23 3.072(3) 151.9 1_455 _diffrn_measured_fraction_theta_max 0.997 _diffrn_reflns_theta_full 27.90 _diffrn_measured_fraction_theta_full 0.997 _refine_diff_density_max 0.257 _refine_diff_density_min -0.248 _refine_diff_density_rms 0.048 _vrf_PLAT220_ca403 ; PROBLEM: Large Non-Solvent C Ueq(max)/Ueq(min) ... 5.30 Ratio RESPONSE: Structure contains disorderd atoms ; _vrf_PLAT222_ca403 ; PROBLEM: Large Non-Solvent H Ueq(max)/Ueq(min) ... 6.03 Ratio RESPONSE: Structure contains disorderd atoms ;