#------------------------------------------------------------------------------ #$Date: 2008-04-03 13:11:48 +0300 (Thu, 03 Apr 2008) $ #$Revision: 326 $ #$URL: file:///home/coder/svn-repositories/cod/cif/2/2216054.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_2216054 loop_ _publ_author_name 'Kaliyaperumal Thanigaimani' 'Packianathan Thomas Muthiah' 'Daniel E. Lynch' _publ_section_title ; Hydrogen-bonding patterns in 2-amino-4,6-dimethoxypyrimidine--phthalic acid (1/1) ; _journal_coeditor_code LW2035 _journal_issue 11 _journal_name_full 'Acta Crystallographica, Section E' _journal_page_first o4212 _journal_page_last o4212 _journal_volume 63 _journal_year 2007 _chemical_formula_iupac 'C6 H9 N3 O2, C8 H6 O4' _chemical_formula_moiety 'C6 H9 N3 O2, C8 H6 O4' _chemical_formula_sum 'C14 H15 N3 O6' _chemical_formula_weight 321.29 _chemical_name_common '2-amino-4,6-dimethoxy pyrimidine phthalic acid' _chemical_name_systematic ; 2-amino-4,6-dimethoxypyrimidine--phthalic acid (1/1) ; _symmetry_cell_setting Monoclinic _symmetry_space_group_name_Hall '-P 2ybc' _symmetry_space_group_name_H-M 'P 21/c' _atom_sites_solution_hydrogens geom _atom_sites_solution_primary direct _atom_sites_solution_secondary difmap _cell_angle_alpha 90 _cell_angle_beta 90.776(2) _cell_angle_gamma 90 _cell_formula_units_Z 4 _cell_length_a 11.2175(3) _cell_length_b 7.3323(2) _cell_length_c 17.7651(4) _cell_measurement_reflns_used 25 _cell_measurement_temperature 120 _cell_measurement_theta_max 27.5 _cell_measurement_theta_min 2.9 _cell_volume 1461.05(6) _computing_cell_refinement 'DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998)' _computing_data_collection 'DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998)' _computing_data_reduction 'DENZO (Otwinowski & Minor, 1997) and COLLECT (Hooft, 1998)' _computing_molecular_graphics 'PLATON (Spek, 2003)' _computing_publication_material 'PLATON (Spek, 2003)' _computing_structure_refinement 'SHELXL97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS97 (Sheldrick, 1997)' _diffrn_ambient_temperature 120 _diffrn_measured_fraction_theta_full 0.990 _diffrn_measured_fraction_theta_max 0.990 _diffrn_measurement_device_type 'Bruker--Nonius KappaCCD area-detector' _diffrn_measurement_method '\f and \w' _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'Bruker--Nonius FR591 rotating anode' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength 0.71073 _diffrn_reflns_av_R_equivalents 0.0286 _diffrn_reflns_av_sigmaI/netI 0.0252 _diffrn_reflns_limit_h_max 14 _diffrn_reflns_limit_h_min -14 _diffrn_reflns_limit_k_max 9 _diffrn_reflns_limit_k_min -9 _diffrn_reflns_limit_l_max 23 _diffrn_reflns_limit_l_min -23 _diffrn_reflns_number 17905 _diffrn_reflns_reduction_process ; ; _diffrn_reflns_theta_full 27.52 _diffrn_reflns_theta_max 27.52 _diffrn_reflns_theta_min 3.52 _exptl_absorpt_coefficient_mu 0.116 _exptl_absorpt_correction_type none _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 1.461 _exptl_crystal_density_method 'Not Measured' _exptl_crystal_description plate _exptl_crystal_F_000 672 _exptl_crystal_size_max 0.50 _exptl_crystal_size_mid 0.40 _exptl_crystal_size_min 0.25 _refine_diff_density_max 0.331 _refine_diff_density_min -0.303 _refine_ls_extinction_coef 0.034(4) _refine_ls_extinction_expression FC^*^=KFC[1+0.001XFC^2^\L^3^/SIN(2\Q)]^-1/4^ _refine_ls_extinction_method 'SHELXL97 (Sheldrick, 1997)' _refine_ls_goodness_of_fit_ref 1.079 _refine_ls_hydrogen_treatment constr _refine_ls_matrix_type full _refine_ls_number_parameters 211 _refine_ls_number_reflns 3328 _refine_ls_number_restraints 0 _refine_ls_restrained_S_all 1.079 _refine_ls_R_factor_all 0.0522 _refine_ls_R_factor_gt 0.0413 _refine_ls_shift/su_max 0.000 _refine_ls_shift/su_mean 0.000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w=1/[\s^2^(Fo^2^)+(0.062P)^2^+0.4007P] where P=(Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_gt 0.1071 _refine_ls_wR_factor_ref 0.1144 _reflns_number_gt 2748 _reflns_number_total 3328 _reflns_threshold_expression I>2\s(I) _[local]_cod_data_source_file lw2035.cif loop_ _symmetry_equiv_pos_site_id _symmetry_equiv_pos_as_xyz 1 x,y,z 2 -x,1/2+y,1/2-z 3 -x,-y,-z 4 x,1/2-y,1/2+z loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source O O 0.0106 0.0060 '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' H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' 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_thermal_displace_type _atom_site_calc_flag _atom_site_refinement_flags _atom_site_occupancy O O1 1.33166(8) 0.41207(13) -0.01434(5) 0.0234(3) Uani . . 1.000 O O2 0.94377(8) 0.19097(15) -0.08929(5) 0.0270(3) Uani . . 1.000 N N1 0.99024(9) 0.26729(16) 0.02820(6) 0.0207(3) Uani . . 1.000 N N2 1.03481(10) 0.33885(18) 0.15133(6) 0.0275(4) Uani . . 1.000 N N3 1.18347(9) 0.37441(15) 0.06527(6) 0.0206(3) Uani . . 1.000 C C2 1.07043(11) 0.32599(18) 0.08002(7) 0.0202(4) Uani . . 1.000 C C4 1.21785(11) 0.35975(17) -0.00621(7) 0.0190(3) Uani . . 1.000 C C5 1.14427(11) 0.29757(18) -0.06394(7) 0.0205(3) Uani . . 1.000 C C6 1.02900(11) 0.25317(18) -0.04249(7) 0.0203(4) Uani . . 1.000 C C7 1.38345(12) 0.39831(19) -0.08761(7) 0.0248(4) Uani . . 1.000 C C8 0.97333(13) 0.1688(2) -0.16733(7) 0.0313(5) Uani . . 1.000 O O3 0.76763(8) 0.15122(14) 0.05538(5) 0.0255(3) Uani . . 1.000 O O4 0.79349(9) 0.23059(17) 0.17615(5) 0.0361(4) Uani . . 1.000 O O5 0.76904(9) -0.13437(16) 0.24381(5) 0.0335(3) Uani . . 1.000 O O6 0.65842(8) -0.00257(14) 0.33283(5) 0.0266(3) Uani . . 1.000 C C9 0.61256(11) 0.08770(17) 0.13920(7) 0.0189(3) Uani . . 1.000 C C10 0.58606(11) 0.00391(17) 0.20794(7) 0.0191(3) Uani . . 1.000 C C11 0.47029(11) -0.05260(19) 0.22163(8) 0.0246(4) Uani . . 1.000 C C12 0.38160(12) -0.0300(2) 0.16694(9) 0.0293(4) Uani . . 1.000 C C13 0.40797(12) 0.0508(2) 0.09912(8) 0.0283(4) Uani . . 1.000 C C14 0.52267(11) 0.11137(19) 0.08528(7) 0.0230(4) Uani . . 1.000 C C15 0.73442(11) 0.16274(18) 0.12583(7) 0.0202(4) Uani . . 1.000 C C16 0.68190(11) -0.04810(18) 0.26337(7) 0.0206(4) Uani . . 1.000 H H2A 1.08350 0.37690 0.18570 0.0330 Uiso calc R 1.000 H H2B 0.96320 0.30910 0.16290 0.0330 Uiso calc R 1.000 H H5 1.16990 0.28630 -0.11330 0.0250 Uiso calc R 1.000 H H7A 1.46440 0.44060 -0.08530 0.0370 Uiso calc R 1.000 H H7B 1.33860 0.47170 -0.12260 0.0370 Uiso calc R 1.000 H H7C 1.38200 0.27340 -0.10380 0.0370 Uiso calc R 1.000 H H8A 0.90510 0.12350 -0.19460 0.0470 Uiso calc R 1.000 H H8B 1.03790 0.08370 -0.17160 0.0470 Uiso calc R 1.000 H H8C 0.99670 0.28430 -0.18780 0.0470 Uiso calc R 1.000 H H3 0.83520 0.19250 0.05140 0.0380 Uiso calc R 1.000 H H6 0.71170 -0.04000 0.36090 0.0400 Uiso calc R 1.000 H H11 0.45190 -0.10580 0.26760 0.0300 Uiso calc R 1.000 H H12 0.30440 -0.06950 0.17610 0.0350 Uiso calc R 1.000 H H13 0.34860 0.06480 0.06250 0.0340 Uiso calc R 1.000 H H14 0.53960 0.16800 0.03980 0.0280 Uiso calc R 1.000 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 O1 0.0198(4) 0.0317(5) 0.0188(4) -0.0030(4) 0.0051(3) -0.0006(4) O2 0.0199(5) 0.0452(6) 0.0160(4) -0.0030(4) 0.0022(3) -0.0057(4) N1 0.0188(5) 0.0277(6) 0.0156(5) -0.0002(4) 0.0027(4) 0.0000(4) N2 0.0186(5) 0.0486(8) 0.0155(5) -0.0066(5) 0.0037(4) -0.0022(5) N3 0.0189(5) 0.0263(6) 0.0165(5) -0.0003(4) 0.0022(4) 0.0002(4) C2 0.0193(6) 0.0232(7) 0.0181(6) 0.0013(5) 0.0015(5) 0.0014(5) C4 0.0187(6) 0.0196(6) 0.0188(6) 0.0025(5) 0.0035(5) 0.0022(5) C5 0.0224(6) 0.0247(7) 0.0145(5) 0.0017(5) 0.0037(5) 0.0003(5) C6 0.0209(6) 0.0228(7) 0.0173(6) 0.0027(5) 0.0007(5) 0.0002(5) C7 0.0242(7) 0.0273(7) 0.0231(6) -0.0019(5) 0.0099(5) -0.0009(6) C8 0.0248(7) 0.0522(10) 0.0170(6) -0.0034(6) 0.0021(5) -0.0083(6) O3 0.0210(5) 0.0382(6) 0.0174(5) -0.0054(4) 0.0041(4) -0.0006(4) O4 0.0277(5) 0.0595(8) 0.0212(5) -0.0182(5) 0.0044(4) -0.0079(5) O5 0.0236(5) 0.0565(7) 0.0204(5) 0.0149(5) 0.0017(4) -0.0024(5) O6 0.0273(5) 0.0363(6) 0.0162(4) 0.0104(4) 0.0020(4) -0.0001(4) C9 0.0197(6) 0.0190(6) 0.0180(6) 0.0009(5) 0.0011(5) -0.0018(5) C10 0.0192(6) 0.0185(6) 0.0198(6) 0.0023(5) 0.0030(5) -0.0011(5) C11 0.0225(6) 0.0233(7) 0.0282(7) 0.0008(5) 0.0071(5) 0.0016(6) C12 0.0164(6) 0.0305(8) 0.0411(8) -0.0022(5) 0.0036(6) -0.0023(6) C13 0.0218(7) 0.0295(8) 0.0334(8) 0.0043(5) -0.0062(5) -0.0011(6) C14 0.0242(6) 0.0225(7) 0.0223(6) 0.0021(5) -0.0017(5) 0.0008(5) C15 0.0208(6) 0.0225(7) 0.0173(6) 0.0011(5) 0.0024(5) 0.0028(5) C16 0.0201(6) 0.0238(7) 0.0180(6) -0.0001(5) 0.0039(5) 0.0016(5) loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_publ_flag O1 C4 1.3427(15) yes O1 C7 1.4361(15) yes O2 C6 1.3386(16) yes O2 C8 1.4391(15) yes O3 C15 1.3134(15) yes O4 C15 1.2123(16) yes O5 C16 1.2188(16) yes O6 C16 1.3086(15) yes O3 H3 0.8200 no O6 H6 0.8200 no N1 C2 1.3489(16) yes N1 C6 1.3385(16) yes N2 C2 1.3368(16) yes N3 C4 1.3364(16) yes N3 C2 1.3460(16) yes N2 H2B 0.8600 no N2 H2A 0.8600 no C4 C5 1.3849(18) no C5 C6 1.3916(18) no C5 H5 0.9300 no C7 H7B 0.9600 no C7 H7A 0.9600 no C7 H7C 0.9600 no C8 H8C 0.9600 no C8 H8A 0.9600 no C8 H8B 0.9600 no C9 C10 1.4025(18) no C9 C15 1.4955(18) no C9 C14 1.3922(18) no C10 C16 1.4974(18) no C10 C11 1.3878(18) no C11 C12 1.391(2) no C12 C13 1.378(2) no C13 C14 1.3863(18) no C11 H11 0.9300 no C12 H12 0.9300 no C13 H13 0.9300 no C14 H14 0.9300 no loop_ _geom_contact_atom_site_label_1 _geom_contact_atom_site_label_2 _geom_contact_distance _geom_contact_site_symmetry_2 _geom_contact_publ_flag O3 N1 2.6881(14) . no O4 C16 2.8629(17) . no O4 N2 2.8609(15) . no O4 O5 2.9479(16) . no O5 O4 2.9479(16) . no O5 N2 2.8704(15) 2_745 no O5 C8 3.2199(17) 3_755 no O5 C15 3.0443(17) . no O6 N3 2.6738(14) 2_745 no O1 H6 2.8000 2_755 no O1 H13 2.8900 1_655 no O2 H3 2.8000 . no O3 H14 2.5700 . no O3 H13 2.9200 3_655 no O4 H7B 2.8000 3_765 no O4 H2B 2.0100 . no O4 H8A 2.8100 4_555 no O5 H2A 2.0600 2_745 no O5 H8B 2.5600 3_755 no O5 H5 2.6700 3_755 no O6 H11 2.6900 . no O6 H7A 2.6700 4_455 no N1 O3 2.6881(14) . no N2 O5 2.8704(15) 2_755 no N2 O4 2.8609(15) . no N2 C8 3.3041(17) 4_555 no N3 O6 2.6738(14) 2_755 no N3 C16 3.4273(16) 2_755 no N1 H3 1.8700 . no N2 H8C 2.8600 3_765 no N3 H6 1.8600 2_755 no N3 H13 2.9300 1_655 no C2 C6 3.3452(19) 3_765 no C6 C2 3.3452(19) 3_765 no C7 C15 3.5417(19) 3_765 no C8 O5 3.2199(17) 3_755 no C8 N2 3.3041(17) 4_554 no C10 C11 3.5441(19) 2_655 no C11 C10 3.5441(19) 2_645 no C13 C14 3.5805(19) 3_655 no C14 C14 3.4735(18) 3_655 no C14 C13 3.5805(19) 3_655 no C15 O5 3.0443(17) . no C15 C7 3.5417(19) 3_765 no C16 O4 2.8629(17) . no C16 N3 3.4273(16) 2_745 no C2 H6 2.8200 2_755 no C2 H3 2.8500 . no C4 H6 2.7900 2_755 no C4 H13 2.8800 1_655 no C5 H7C 2.7700 . no C5 H8B 2.7300 . no C5 H8C 2.7400 . no C5 H7B 2.7400 . no C6 H3 2.7900 . no C7 H11 3.0900 4_654 no C7 H5 2.5700 . no C8 H2B 3.0200 4_554 no C8 H2A 2.9200 4_554 no C8 H5 2.5400 . no C9 H7C 2.7200 3_755 no C9 H11 2.8900 2_655 no C10 H7C 2.7800 3_755 no C10 H11 2.9300 2_655 no C13 H14 3.0100 3_655 no C14 H14 3.1000 3_655 no C14 H7C 3.0300 3_755 no C15 H7B 2.8000 3_765 no C15 H2B 2.8500 . no C16 H2A 2.8300 2_745 no H2A C16 2.8300 2_755 no H2A O5 2.0600 2_755 no H2A H6 2.5300 2_755 no H2A C8 2.9200 4_555 no H2B O4 2.0100 . no H2B C8 3.0200 4_555 no H2B H3 2.5800 . no H2B C15 2.8500 . no H3 C2 2.8500 . no H3 N1 1.8700 . no H3 O2 2.8000 . no H3 C6 2.7900 . no H3 H2B 2.5800 . no H5 C7 2.5700 . no H5 O5 2.6700 3_755 no H5 H8C 2.3400 . no H5 C8 2.5400 . no H5 H7B 2.3400 . no H5 H7C 2.3800 . no H5 H8B 2.3300 . no H6 C4 2.7900 2_745 no H6 H2A 2.5300 2_745 no H6 C2 2.8200 2_745 no H6 N3 1.8600 2_745 no H6 O1 2.8000 2_745 no H7A O6 2.6700 4_654 no H7B C5 2.7400 . no H7B C15 2.8000 3_765 no H7B H11 2.5400 4_654 no H7B O4 2.8000 3_765 no H7B H5 2.3400 . no H7C H5 2.3800 . no H7C C9 2.7200 3_755 no H7C C14 3.0300 3_755 no H7C C10 2.7800 3_755 no H7C C5 2.7700 . no H8A H12 2.4100 3_655 no H8A O4 2.8100 4_554 no H8B H5 2.3300 . no H8B O5 2.5600 3_755 no H8B C5 2.7300 . no H8C N2 2.8600 3_765 no H8C C5 2.7400 . no H8C H5 2.3400 . no H11 O6 2.6900 . no H11 C9 2.8900 2_645 no H11 C10 2.9300 2_645 no H11 C7 3.0900 4_455 no H11 H7B 2.5400 4_455 no H12 H8A 2.4100 3_655 no H13 O1 2.8900 1_455 no H13 N3 2.9300 1_455 no H13 C4 2.8800 1_455 no H13 O3 2.9200 3_655 no H14 O3 2.5700 . no H14 C13 3.0100 3_655 no H14 C14 3.1000 3_655 no 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 C4 O1 C7 118.31(10) yes C6 O2 C8 117.70(10) yes C15 O3 H3 109.00 no C16 O6 H6 109.00 no C2 N1 C6 116.29(11) yes C2 N3 C4 116.65(11) yes C2 N2 H2B 120.00 no H2A N2 H2B 120.00 no C2 N2 H2A 120.00 no N1 C2 N3 124.93(11) yes N2 C2 N3 117.41(11) yes N1 C2 N2 117.65(11) yes O1 C4 C5 124.92(11) yes N3 C4 C5 123.60(11) yes O1 C4 N3 111.49(11) yes C4 C5 C6 114.89(11) no O2 C6 C5 124.62(11) yes N1 C6 C5 123.62(11) yes O2 C6 N1 111.76(11) yes C4 C5 H5 123.00 no C6 C5 H5 123.00 no O1 C7 H7B 109.00 no O1 C7 H7C 109.00 no H7A C7 H7C 109.00 no H7B C7 H7C 110.00 no H7A C7 H7B 110.00 no O1 C7 H7A 109.00 no O2 C8 H8C 109.00 no H8A C8 H8B 109.00 no H8A C8 H8C 110.00 no H8B C8 H8C 109.00 no O2 C8 H8A 109.00 no O2 C8 H8B 109.00 no C10 C9 C14 119.58(11) no C14 C9 C15 120.00(11) no C10 C9 C15 120.29(11) no C9 C10 C16 121.70(11) no C11 C10 C16 118.29(11) no C9 C10 C11 119.56(12) no C10 C11 C12 120.28(13) no C11 C12 C13 120.12(13) no C12 C13 C14 120.23(13) no C9 C14 C13 120.22(12) no O3 C15 C9 113.54(11) yes O4 C15 C9 121.70(11) yes O3 C15 O4 124.74(12) yes O6 C16 C10 113.78(11) yes O5 C16 O6 125.01(12) yes O5 C16 C10 121.07(11) yes C10 C11 H11 120.00 no C12 C11 H11 120.00 no C11 C12 H12 120.00 no C13 C12 H12 120.00 no C12 C13 H13 120.00 no C14 C13 H13 120.00 no C9 C14 H14 120.00 no C13 C14 H14 120.00 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_publ_flag C7 O1 C4 N3 177.86(11) no C7 O1 C4 C5 -1.95(18) no C8 O2 C6 N1 -179.91(11) no C8 O2 C6 C5 -0.14(19) no C6 N1 C2 N2 -179.02(12) no C6 N1 C2 N3 1.7(2) no C2 N1 C6 O2 178.89(11) no C2 N1 C6 C5 -0.89(19) no C4 N3 C2 N1 -1.06(19) no C4 N3 C2 N2 179.63(12) no C2 N3 C4 O1 179.80(11) no C2 N3 C4 C5 -0.39(19) no O1 C4 C5 C6 -179.18(12) no N3 C4 C5 C6 1.04(19) no C4 C5 C6 O2 179.89(12) no C4 C5 C6 N1 -0.36(19) no C14 C9 C10 C11 -0.67(19) no C14 C9 C10 C16 171.44(12) no C15 C9 C10 C11 175.14(12) no C15 C9 C10 C16 -12.75(18) no C10 C9 C14 C13 -0.7(2) no C15 C9 C14 C13 -176.50(12) no C10 C9 C15 O3 147.33(12) no C10 C9 C15 O4 -34.25(19) no C14 C9 C15 O3 -36.88(17) no C14 C9 C15 O4 141.55(14) no C9 C10 C11 C12 1.4(2) no C16 C10 C11 C12 -170.97(13) no C9 C10 C16 O5 -49.60(19) no C9 C10 C16 O6 134.45(13) no C11 C10 C16 O5 122.61(15) no C11 C10 C16 O6 -53.35(16) no C10 C11 C12 C13 -0.8(2) no C11 C12 C13 C14 -0.6(2) no C12 C13 C14 C9 1.3(2) 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 N2 H2A O5 2_755 0.8600 2.0600 2.8704(15) 156.00 yes N2 H2B O4 . 0.8600 2.0100 2.8609(15) 173.00 yes O3 H3 N1 . 0.8200 1.8700 2.6881(14) 171.00 yes O6 H6 N3 2_745 0.8200 1.8600 2.6738(14) 172.00 yes C8 H8B O5 3_755 0.9600 2.5600 3.2199(17) 126.00 yes