#------------------------------------------------------------------------------ #$Date: 2012-02-03 19:16:24 +0200 (Fri, 03 Feb 2012) $ #$Revision: 32112 $ #$URL: file:///home/coder/svn-repositories/cod/cif/2/01/27/2012716.cif $ #------------------------------------------------------------------------------ # # This file is available in the Crystallography Open Database (COD), # http://www.crystallography.net/. The original data for this entry # were provided by IUCr Journals, http://journals.iucr.org/. # # The file may be used within the scientific community so long as # proper attribution is given to the journal article from which the # data were obtained. # data_2012716 loop_ _publ_author_name 'Low, John N.' 'Quesada, Antonio' 'Marchal, Antonio' 'Nogueras, Manuel' 'S\'anchez, Adolfo' 'Glidewell, Christopher' _publ_section_title ; 4-Amino-6-benzyloxy-2-(methylsulfanyl)-5-nitrosopyrimidine: hydrogen-bonded dimers linked into \p-stacked chains ; _journal_issue 5 _journal_name_full 'Acta Crystallographica Section C' _journal_page_first o284 _journal_page_last o286 _journal_volume 58 _journal_year 2002 _chemical_formula_iupac 'C12 H12 N4 O2 S' _chemical_formula_moiety 'C12 H12 N4 O2 S' _chemical_formula_sum 'C12 H12 N4 O2 S' _chemical_formula_weight 276.32 _chemical_name_systematic ; ? ; _space_group_IT_number 14 _symmetry_cell_setting monoclinic _symmetry_space_group_name_Hall '-P 2ybc' _symmetry_space_group_name_H-M 'P 1 21/c 1' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _cell_angle_alpha 90.00 _cell_angle_beta 90.830(2) _cell_angle_gamma 90.00 _cell_formula_units_Z 8 _cell_length_a 15.6152(10) _cell_length_b 9.1842(6) _cell_length_c 17.7920(11) _cell_measurement_reflns_used 6223 _cell_measurement_temperature 120(2) _cell_measurement_theta_max 28.98 _cell_measurement_theta_min 1.30 _cell_volume 2551.3(3) _computing_cell_refinement SMART _computing_data_collection 'SMART (Bruker, 1997)' _computing_data_reduction 'SHELXTL (Bruker, 1997)' _computing_molecular_graphics 'PLATON (Spek, 2002)' _computing_publication_material 'SHELXL97 and PRPKAPPA (Ferguson, 1999)' _computing_structure_refinement 'SHELXL97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS97 (Sheldrick, 1997)' _diffrn_ambient_temperature 120(2) _diffrn_measured_fraction_theta_full 1.000 _diffrn_measured_fraction_theta_max 0.917 _diffrn_measurement_device_type 'Bruker-SMART-1000 CCD' _diffrn_measurement_method '\f scans, and \w scans with \k offsets' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed X-ray tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0233 _diffrn_reflns_av_sigmaI/netI 0.0231 _diffrn_reflns_limit_h_max 20 _diffrn_reflns_limit_h_min -20 _diffrn_reflns_limit_k_max 12 _diffrn_reflns_limit_k_min -12 _diffrn_reflns_limit_l_max 23 _diffrn_reflns_limit_l_min -23 _diffrn_reflns_number 24010 _diffrn_reflns_theta_full 25.00 _diffrn_reflns_theta_max 28.98 _diffrn_reflns_theta_min 1.30 _diffrn_standards_decay_% negligible _exptl_absorpt_coefficient_mu 0.257 _exptl_absorpt_correction_T_max 0.950 _exptl_absorpt_correction_T_min 0.882 _exptl_absorpt_correction_type multi-scan _exptl_absorpt_process_details '(SADABS; Bruker, 1997)' _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 1.439 _exptl_crystal_density_method 'not measured' _exptl_crystal_description block _exptl_crystal_F_000 1152 _exptl_crystal_size_max 0.50 _exptl_crystal_size_mid 0.35 _exptl_crystal_size_min 0.20 _refine_diff_density_max 0.346 _refine_diff_density_min -0.245 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.046 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 345 _refine_ls_number_reflns 6223 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.046 _refine_ls_R_factor_all 0.0507 _refine_ls_R_factor_gt 0.0365 _refine_ls_shift/su_max 0.001 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'w = 1/[\s^2^(Fo^2^)+(0.058P)^2^+0.327P] where P = (Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.0962 _refine_ls_wR_factor_ref 0.1011 _reflns_number_gt 4840 _reflns_number_total 6223 _reflns_threshold_expression I>2\s(I) _[local]_cod_data_source_file na1564.cif _[local]_cod_data_source_block I _[local]_cod_cif_authors_sg_H-M 'P 21/c' _cod_database_code 2012716 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' '-x, y+1/2, -z+1/2' '-x, -y, -z' 'x, -y+1/2, z+1/2' loop_ _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 _atom_site_type_symbol N11 0.26619(7) 0.57631(12) 0.38289(6) 0.0256(2) Uani d . 1 . . N C12 0.34204(8) 0.50920(15) 0.39377(7) 0.0251(3) Uani d . 1 . . C S12 0.37614(2) 0.38279(4) 0.32777(2) 0.03292(10) Uani d . 1 . . S C121 0.29268(10) 0.3893(2) 0.25706(9) 0.0404(4) Uani d . 1 . . C N13 0.39803(7) 0.52625(12) 0.45058(6) 0.0253(2) Uani d . 1 . . N C14 0.37771(8) 0.62629(15) 0.50305(7) 0.0250(3) Uani d . 1 . . C N14 0.43291(7) 0.64343(14) 0.55976(7) 0.0315(3) Uani d . 1 . . N C15 0.29961(8) 0.70870(15) 0.49700(8) 0.0261(3) Uani d . 1 . . C N15 0.27135(8) 0.81465(14) 0.54536(7) 0.0363(3) Uani d . 1 . . N O15 0.31865(7) 0.84115(13) 0.60181(6) 0.0432(3) Uani d . 1 . . O C16 0.24639(8) 0.67458(15) 0.43399(8) 0.0255(3) Uani d . 1 . . C O16 0.17207(6) 0.74563(11) 0.42737(6) 0.0298(2) Uani d . 1 . . O C167 0.11727(9) 0.70483(16) 0.36374(8) 0.0312(3) Uani d . 1 . . C C161 0.04088(9) 0.80449(16) 0.36150(8) 0.0288(3) Uani d . 1 . . C C162 0.00075(10) 0.85356(16) 0.42541(8) 0.0330(3) Uani d . 1 . . C C163 -0.07137(10) 0.94235(17) 0.42015(9) 0.0355(3) Uani d . 1 . . C C164 -0.10439(10) 0.98162(19) 0.35154(9) 0.0410(4) Uani d . 1 . . C C165 -0.06544(12) 0.9315(2) 0.28700(10) 0.0558(5) Uani d . 1 . . C C166 0.00637(11) 0.8434(2) 0.29205(9) 0.0479(5) Uani d . 1 . . C N21 0.23421(7) 0.27186(13) 0.50043(6) 0.0264(2) Uani d . 1 . . N C22 0.15755(8) 0.30913(15) 0.46994(7) 0.0261(3) Uani d . 1 . . C S22 0.12166(2) 0.21882(4) 0.38943(2) 0.03311(10) Uani d . 1 . . S C221 0.20532(10) 0.09006(17) 0.37297(10) 0.0390(4) Uani d . 1 . . C N23 0.10250(7) 0.40863(13) 0.49387(6) 0.0273(3) Uani d . 1 . . N C24 0.12322(8) 0.47877(16) 0.55858(8) 0.0281(3) Uani d . 1 . . C N24 0.06825(8) 0.57627(15) 0.58339(7) 0.0383(3) Uani d . 1 . . N C25 0.20171(9) 0.44616(16) 0.59792(8) 0.0293(3) Uani d . 1 . . C N25 0.22988(8) 0.50434(16) 0.66500(7) 0.0407(3) Uani d . 1 . . N O25 0.18349(8) 0.60084(15) 0.69388(7) 0.0528(3) Uani d . 1 . . O C26 0.25442(8) 0.34040(15) 0.56363(8) 0.0270(3) Uani d . 1 . . C O26 0.32842(6) 0.31138(11) 0.59831(5) 0.0303(2) Uani d . 1 . . O C267 0.38374(9) 0.20328(17) 0.56463(9) 0.0335(3) Uani d . 1 . . C C261 0.45856(9) 0.18088(17) 0.61798(9) 0.0337(3) Uani d . 1 . . C C262 0.50491(11) 0.0520(2) 0.61235(12) 0.0511(5) Uani d . 1 . . C C263 0.57526(12) 0.0281(2) 0.65882(14) 0.0668(6) Uani d . 1 . . C C264 0.60074(11) 0.1306(2) 0.71148(13) 0.0611(6) Uani d . 1 . . C C265 0.55452(10) 0.2569(2) 0.71799(10) 0.0480(5) Uani d . 1 . . C C266 0.48365(9) 0.28248(19) 0.67110(9) 0.0389(4) Uani d . 1 . . C H12A 0.2367 0.3832 0.2812 0.061 Uiso calc R 1 . . H H12B 0.2992 0.3072 0.2224 0.061 Uiso calc R 1 . . H H12C 0.2966 0.4809 0.2291 0.061 Uiso calc R 1 . . H H14A 0.4800 0.5909 0.5618 0.038 Uiso calc R 1 . . H H14B 0.4224 0.7073 0.5953 0.038 Uiso calc R 1 . . H H16A 0.0983 0.6026 0.3692 0.037 Uiso calc R 1 . . H H16B 0.1494 0.7133 0.3164 0.037 Uiso calc R 1 . . H H162 0.0226 0.8264 0.4735 0.040 Uiso calc R 1 . . H H163 -0.0979 0.9759 0.4647 0.043 Uiso calc R 1 . . H H164 -0.1534 1.0426 0.3481 0.049 Uiso calc R 1 . . H H165 -0.0881 0.9576 0.2391 0.067 Uiso calc R 1 . . H H166 0.0323 0.8092 0.2474 0.058 Uiso calc R 1 . . H H22A 0.2597 0.1417 0.3671 0.059 Uiso calc R 1 . . H H22B 0.1922 0.0349 0.3271 0.059 Uiso calc R 1 . . H H22C 0.2099 0.0230 0.4157 0.059 Uiso calc R 1 . . H H24A 0.0205 0.5933 0.5581 0.046 Uiso calc R 1 . . H H24B 0.0794 0.6242 0.6252 0.046 Uiso calc R 1 . . H H26A 0.4040 0.2378 0.5153 0.040 Uiso calc R 1 . . H H26B 0.3523 0.1107 0.5570 0.040 Uiso calc R 1 . . H H262 0.4882 -0.0197 0.5765 0.061 Uiso calc R 1 . . H H263 0.6066 -0.0601 0.6545 0.080 Uiso calc R 1 . . H H264 0.6496 0.1137 0.7427 0.073 Uiso calc R 1 . . H H265 0.5708 0.3273 0.7546 0.058 Uiso calc R 1 . . H H266 0.4524 0.3707 0.6758 0.047 Uiso calc R 1 . . H 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 N11 0.0202(5) 0.0290(6) 0.0275(6) -0.0012(4) -0.0042(4) 0.0013(5) C12 0.0214(6) 0.0269(7) 0.0270(6) -0.0037(5) -0.0007(5) 0.0006(5) S12 0.02645(18) 0.0395(2) 0.03268(19) 0.00186(15) -0.00430(14) -0.01012(15) C121 0.0306(8) 0.0596(11) 0.0308(8) -0.0036(7) -0.0061(6) -0.0118(7) N13 0.0195(5) 0.0288(6) 0.0276(6) 0.0006(5) -0.0034(4) -0.0007(5) C14 0.0203(6) 0.0276(7) 0.0269(6) -0.0028(5) -0.0033(5) 0.0012(5) N14 0.0239(6) 0.0381(7) 0.0324(6) 0.0051(5) -0.0090(5) -0.0083(5) C15 0.0212(6) 0.0265(7) 0.0306(7) 0.0000(5) -0.0036(5) -0.0001(5) N15 0.0306(7) 0.0371(7) 0.0409(7) 0.0034(5) -0.0065(5) -0.0090(6) O15 0.0353(6) 0.0503(7) 0.0437(6) 0.0053(5) -0.0125(5) -0.0178(5) C16 0.0193(6) 0.0267(7) 0.0305(7) -0.0018(5) -0.0033(5) 0.0050(5) O16 0.0218(5) 0.0331(5) 0.0343(5) 0.0042(4) -0.0099(4) -0.0013(4) C167 0.0249(7) 0.0363(8) 0.0320(7) 0.0017(6) -0.0106(6) 0.0006(6) C161 0.0205(6) 0.0345(8) 0.0314(7) -0.0026(6) -0.0053(5) 0.0046(6) C162 0.0348(8) 0.0348(8) 0.0293(7) -0.0004(6) -0.0072(6) 0.0022(6) C163 0.0311(8) 0.0387(8) 0.0367(8) -0.0016(6) 0.0002(6) -0.0033(6) C164 0.0260(8) 0.0500(10) 0.0467(9) 0.0080(7) -0.0078(7) -0.0018(7) C165 0.0461(10) 0.0865(15) 0.0344(9) 0.0268(10) -0.0097(8) 0.0083(9) C166 0.0390(9) 0.0765(13) 0.0283(8) 0.0208(9) 0.0005(7) 0.0071(8) N21 0.0193(5) 0.0307(6) 0.0293(6) 0.0015(5) -0.0019(4) 0.0056(5) C22 0.0218(6) 0.0307(7) 0.0257(6) -0.0005(5) -0.0009(5) 0.0060(5) S22 0.02616(18) 0.0416(2) 0.03141(19) 0.00181(15) -0.00467(14) -0.00393(15) C221 0.0344(8) 0.0364(8) 0.0463(9) 0.0017(7) 0.0016(7) -0.0075(7) N23 0.0205(5) 0.0354(6) 0.0259(6) 0.0033(5) -0.0050(4) 0.0024(5) C24 0.0199(6) 0.0362(8) 0.0281(7) 0.0027(6) -0.0042(5) 0.0029(6) N24 0.0266(6) 0.0523(8) 0.0358(7) 0.0138(6) -0.0112(5) -0.0106(6) C25 0.0197(6) 0.0397(8) 0.0282(7) 0.0034(6) -0.0057(5) 0.0027(6) N25 0.0291(7) 0.0567(9) 0.0361(7) 0.0086(6) -0.0080(5) -0.0073(6) O25 0.0370(6) 0.0748(9) 0.0460(7) 0.0187(6) -0.0140(5) -0.0226(6) C26 0.0192(6) 0.0328(7) 0.0287(7) 0.0000(5) -0.0025(5) 0.0102(6) O26 0.0196(5) 0.0387(6) 0.0324(5) 0.0063(4) -0.0053(4) 0.0053(4) C267 0.0231(7) 0.0353(8) 0.0420(8) 0.0065(6) -0.0030(6) 0.0043(6) C261 0.0173(6) 0.0391(8) 0.0447(8) 0.0025(6) 0.0001(6) 0.0159(7) C262 0.0294(8) 0.0452(10) 0.0787(13) 0.0099(7) -0.0015(8) 0.0112(9) C263 0.0315(9) 0.0584(13) 0.1103(18) 0.0178(9) -0.0063(11) 0.0271(12) C264 0.0215(8) 0.0762(14) 0.0852(15) -0.0004(9) -0.0142(9) 0.0438(12) C265 0.0275(8) 0.0641(12) 0.0520(10) -0.0124(8) -0.0118(7) 0.0252(9) C266 0.0242(7) 0.0445(9) 0.0476(9) -0.0001(6) -0.0066(6) 0.0177(7) 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 N11 C12 . 1.347(2) y C12 N13 . 1.336(2) y N13 C14 . 1.351(2) y C14 C15 . 1.438(2) y C15 C16 . 1.421(2) y C16 N11 . 1.321(2) y C12 S12 . 1.740(2) y S12 C121 . 1.799(2) y C121 H12A . 0.9800 no C121 H12B . 0.9800 no C121 H12C . 0.9800 no C14 N14 . 1.327(2) y N14 H14A . 0.8800 no N14 H14B . 0.8800 no C15 N15 . 1.376(2) y N15 O15 . 1.262(2) y C16 O16 . 1.335(2) y O16 C167 . 1.458(2) no C167 C161 . 1.504(2) no C167 H16A . 0.9900 no C167 H16B . 0.9900 no C161 C162 . 1.382(2) no C161 C166 . 1.388(2) no C162 C163 . 1.392(2) no C162 H162 . 0.9500 no C163 C164 . 1.367(2) no C163 H163 . 0.9500 no C164 C165 . 1.386(2) no C164 H164 . 0.9500 no C165 C166 . 1.384(2) no C165 H165 . 0.9500 no C166 H166 . 0.9500 no N21 C22 . 1.351(2) y C22 N23 . 1.329(2) y N23 C24 . 1.354(2) y C24 C25 . 1.434(2) y C25 C26 . 1.417(2) y C26 N21 . 1.323(2) y C22 S22 . 1.741(2) y S22 C221 . 1.789(2) y C221 H22A . 0.9800 no C221 H22B . 0.9800 no C221 H22C . 0.9800 no C24 N24 . 1.321(2) y N24 H24A . 0.8800 no N24 H24B . 0.8800 no C25 N25 . 1.374(2) y N25 O25 . 1.259(2) y C26 O26 . 1.329(2) y O26 C267 . 1.451(2) no C267 C261 . 1.509(2) no C267 H26A . 0.9900 no C267 H26B . 0.9900 no C261 C266 . 1.381(2) no C261 C262 . 1.392(2) no C262 C263 . 1.383(3) no C262 H262 . 0.9500 no C263 C264 . 1.382(3) no C263 H263 . 0.9500 no C264 C265 . 1.372(3) no C264 H264 . 0.9500 no C265 C266 . 1.396(2) no C265 H265 . 0.9500 no C266 H266 . 0.9500 no 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' S S 0.1246 0.1234 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' loop_ _geom_angle_atom_site_label_1 _geom_angle_atom_site_label_2 _geom_angle_atom_site_label_3 _geom_angle _geom_angle_publ_flag C16 N11 C12 115.3(2) no N13 C12 N11 128.3(2) no N13 C12 S12 112.67(9) no N11 C12 S12 119.04(9) no C12 S12 C121 102.95(7) no S12 C121 H12A 109.5 no S12 C121 H12B 109.5 no H12A C121 H12B 109.5 no S12 C121 H12C 109.5 no H12A C121 H12C 109.5 no H12B C121 H12C 109.5 no C12 N13 C14 116.4(2) no N14 C14 N13 116.7(2) no N14 C14 C15 122.4(2) no N13 C14 C15 120.9(2) no C14 N14 H14A 120.0 no C14 N14 H14B 120.0 no H14A N14 H14B 120.0 no N15 C15 C16 117.4(2) no N15 C15 C14 127.2(2) no C16 C15 C14 115.4(2) no O15 N15 C15 116.4(2) no N11 C16 O16 119.0(2) no N11 C16 C15 123.6(2) no O16 C16 C15 117.4(2) no C16 O16 C167 116.3(2) no O16 C167 C161 108.7(2) no O16 C167 H16A 110.0 no C161 C167 H16A 110.0 no O16 C167 H16B 110.0 no C161 C167 H16B 110.0 no H16A C167 H16B 108.3 no C162 C161 C166 118.3(2) no C162 C161 C167 123.1(2) no C166 C161 C167 118.6(2) no C161 C162 C163 120.8(2) no C161 C162 H162 119.6 no C163 C162 H162 119.6 no C164 C163 C162 120.6(2) no C164 C163 H163 119.7 no C162 C163 H163 119.7 no C163 C164 C165 119.2(2) no C163 C164 H164 120.4 no C165 C164 H164 120.4 no C166 C165 C164 120.3(2) no C166 C165 H165 119.8 no C164 C165 H165 119.8 no C165 C166 C161 120.8(2) no C165 C166 H166 119.6 no C161 C166 H166 119.6 no C26 N21 C22 114.8(2) no N23 C22 N21 128.3(2) no N23 C22 S22 112.91(9) no N21 C22 S22 118.9(2) no C22 S22 C221 102.85(7) no S22 C221 H22A 109.5 no S22 C221 H22B 109.5 no H22A C221 H22B 109.5 no S22 C221 H22C 109.5 no H22A C221 H22C 109.5 no H22B C221 H22C 109.5 no C22 N23 C24 116.9(2) no N24 C24 N23 117.3(2) no N24 C24 C25 122.2(2) no N23 C24 C25 120.5(2) no C24 N24 H24A 120.0 no C24 N24 H24B 120.0 no H24A N24 H24B 120.0 no N25 C25 C26 117.4(2) no N25 C25 C24 127.1(2) no C26 C25 C24 115.5(2) no O25 N25 C25 116.7(2) no N21 C26 O26 119.6(2) no N21 C26 C25 124.0(2) no O26 C26 C25 116.4(2) no C26 O26 C267 117.7(2) no O26 C267 C261 107.1(2) no O26 C267 H26A 110.3 no C261 C267 H26A 110.3 no O26 C267 H26B 110.3 no C261 C267 H26B 110.3 no H26A C267 H26B 108.6 no C266 C261 C262 118.8(2) no C266 C261 C267 123.2(2) no C262 C261 C267 118.0(2) no C263 C262 C261 120.1(2) no C263 C262 H262 120.0 no C261 C262 H262 120.0 no C264 C263 C262 121.1(2) no C264 C263 H263 119.5 no C262 C263 H263 119.5 no C265 C264 C263 119.1(2) no C265 C264 H264 120.5 no C263 C264 H264 120.5 no C264 C265 C266 120.3(2) no C264 C265 H265 119.8 no C266 C265 H265 119.8 no C261 C266 C265 120.7(2) no C261 C266 H266 119.7 no C265 C266 H266 119.7 no 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 _geom_hbond_publ_flag N14 H14A N13 3_666 0.88 2.20 3.073(2) 171 y N14 H14B O15 . 0.88 2.04 2.661(2) 127 y N24 H24A N23 3_566 0.88 2.12 2.985(2) 168 y N24 H24B O25 . 0.88 2.03 2.655(2) 127 y 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_publ_flag C121 S12 C12 N13 -177.10(10) y O15 N15 C15 C16 178.50(10) y C221 S22 C22 N23 -178.00(10) y O25 N25 C25 C26 178.30(10) y