#------------------------------------------------------------------------------ #$Date: 2011-09-10 04:16:28 +0100 (Sat, 10 Sep 2011) $ #$Revision: 25271 $ #$URL: svn://www.crystallography.net/cod/cif/2/2012076.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_2012076 loop_ _publ_author_name 'Lakshmanan, Thiruneelakantan' 'Sriram, Desikan' 'Loganathan, Duraikannu' _publ_section_title ; \b-1-Acetamido-4-O-\b-D-galactopyranosyl-D-glucopyranose dihydrate ; _journal_issue 7 _journal_name_full 'Acta Crystallographica Section C' _journal_page_first 825 _journal_page_last 826 _journal_volume 57 _journal_year 2001 _chemical_formula_iupac 'C14 H25 N O11, 2H2 O' _chemical_formula_moiety 'C14 H25 N O11, 2H2 O' _chemical_formula_sum 'C14 H29 N O13' _chemical_formula_weight 419.38 _chemical_name_common 'lactosyl acetamide' _chemical_name_systematic ; \b-1-N-Acetamido-(4-O-\b-D-galactopyranosyl)-D-glucopyranose dihydrate ; _chemical_temperature_decomposition 515.15 _space_group_IT_number 1 _symmetry_cell_setting triclinic _symmetry_space_group_name_Hall 'P 1' _symmetry_space_group_name_H-M 'P 1' _cell_angle_alpha 85.470(10) _cell_angle_beta 84.06(2) _cell_angle_gamma 75.190(10) _cell_formula_units_Z 1 _cell_length_a 4.860(6) _cell_length_b 7.603(10) _cell_length_c 13.242(2) _cell_measurement_reflns_used 25 _cell_measurement_temperature 293(2) _cell_measurement_theta_max 25 _cell_measurement_theta_min 15 _cell_volume 469.8(9) _computing_cell_refinement 'CAD-4 Software' _computing_data_collection 'CAD-4 Software (Enraf-Nonius, 1989)' _computing_data_reduction 'CAD-4 Software' _computing_molecular_graphics 'PLATON (Spek, 2000)' _computing_publication_material SHELXL97 _computing_structure_refinement 'SHELXL97 (Sheldrick, 1997)' _computing_structure_solution 'SHELXS97 (Sheldrick, 1990)' _diffrn_ambient_temperature 293(2) _diffrn_measured_fraction_theta_full .999 _diffrn_measured_fraction_theta_max .999 _diffrn_measurement_device_type 'Enraf-Nonius CAD-4' _diffrn_measurement_method \w/2\q _diffrn_radiation_monochromator graphite _diffrn_radiation_source 'fine-focus sealed tube' _diffrn_radiation_type MoK\a _diffrn_radiation_wavelength .71073 _diffrn_reflns_av_R_equivalents .0000 _diffrn_reflns_av_sigmaI/netI .0143 _diffrn_reflns_limit_h_max 5 _diffrn_reflns_limit_h_min -5 _diffrn_reflns_limit_k_max 8 _diffrn_reflns_limit_k_min -8 _diffrn_reflns_limit_l_max 15 _diffrn_reflns_limit_l_min 0 _diffrn_reflns_number 1650 _diffrn_reflns_theta_full 24.96 _diffrn_reflns_theta_max 24.96 _diffrn_reflns_theta_min 2.78 _diffrn_standards_decay_% 3 _diffrn_standards_interval_time 60 _diffrn_standards_number TWO _exptl_absorpt_coefficient_mu .132 _exptl_absorpt_correction_T_max .96 _exptl_absorpt_correction_T_min .92 _exptl_absorpt_correction_type psi-scan _exptl_absorpt_process_details 'Molen (Fair, 1990)' _exptl_crystal_colour colourless _exptl_crystal_density_diffrn 1.482 _exptl_crystal_density_method 'not measured' _exptl_crystal_description prismatic _exptl_crystal_F_000 224 _exptl_crystal_size_max .35 _exptl_crystal_size_mid .35 _exptl_crystal_size_min .34 _refine_diff_density_max .195 _refine_diff_density_min -.226 _refine_ls_extinction_method none _refine_ls_goodness_of_fit_ref 1.043 _refine_ls_hydrogen_treatment mixed _refine_ls_matrix_type full _refine_ls_number_parameters 274 _refine_ls_number_reflns 1650 _refine_ls_number_restraints 7 _refine_ls_restrained_S_all 1.041 _refine_ls_R_factor_all .0282 _refine_ls_R_factor_gt .0269 _refine_ls_shift/su_max <0.001 _refine_ls_shift/su_mean .000 _refine_ls_structure_factor_coef Fsqd _refine_ls_weighting_details 'calc w = 1/[\s^2^(Fo^2^)+(0.0507P)^2^+0.0587P] where P = (Fo^2^+2Fc^2^)/3' _refine_ls_weighting_scheme calc _refine_ls_wR_factor_ref .0719 _reflns_number_gt 1592 _reflns_number_total 1650 _reflns_threshold_expression I>2\s(I) _[local]_cod_data_source_file de1160.cif _[local]_cod_data_source_block I _cod_depositor_comments ; The following automatic conversions were performed: '_chemical_melting_point' tag was changed to '_chemical_temperature_decomposition' since the value had been given as '242\%C (dec.)'. The value '242\%C (dec.)' was changed to '515.15' - it was converted from degrees Celsius(C) to Kelvins(K). '_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic' according to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29. Automatic conversion script Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana ; _cod_database_code 2012076 loop_ _symmetry_equiv_pos_as_xyz 'x, y, z' 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_type_symbol O12 .1888(4) 1.1234(2) .60493(14) .0373(4) Uani d . 1 O H12 .1219 1.1260 .5503 .056 Uiso calc R 1 H O13 .5483(4) .8945(2) .45750(13) .0376(4) Uani d . 1 O H13 .5303 .8512 .4045 .056 Uiso calc R 1 H O14 .4999(3) .5001(2) .49993(12) .0286(4) Uani d . 1 O O15 .4007(3) .6882(2) .74663(12) .0280(4) Uani d . 1 O O16 .8414(4) .3772(2) .72945(15) .0376(4) Uani d . 1 O H16 .9556 .3080 .6915 .056 Uiso calc R 1 H O17 -.2337(4) .9611(3) .86653(17) .0475(5) Uani d . 1 O O22 .8527(4) .1579(2) .44883(14) .0355(4) Uani d . 1 O H22 .7792 .0714 .4545 .053 Uiso calc R 1 H O23 .9578(4) .0949(2) .23720(15) .0352(4) Uani d . 1 O H23 .8076 .0717 .2270 .053 Uiso calc R 1 H O24 .4932(4) .3828(2) .18127(13) .0325(4) Uani d . 1 O H24 .4566 .4136 .1224 .049 Uiso calc R 1 H O25 .5519(3) .6114(2) .33784(13) .0297(4) Uani d . 1 O O26 .5246(4) .9281(2) .22159(18) .0459(5) Uani d . 1 O H26 .3542 .9782 .2314 .069 Uiso calc R 1 H N1 .2131(4) .9707(3) .80935(16) .0283(4) Uani d . 1 N H1 .3553 1.0149 .8171 .034 Uiso calc R 1 H C1 -.0124(5) 1.0039(3) .87794(19) .0303(5) Uani d . 1 C C2 .0176(7) 1.0977(5) .9694(2) .0500(8) Uani d . 1 C H2A .2046 1.1197 .9649 .075 Uiso calc PR .50 H H2B -.0083 1.0223 1.0294 .075 Uiso calc PR .50 H H2C -.1241 1.2117 .9727 .075 Uiso calc PR .50 H H2D -.1564 1.1161 1.0131 .075 Uiso calc PR .50 H H2E .0564 1.2135 .9486 .075 Uiso calc PR .50 H H2F .1723 1.0241 1.0053 .075 Uiso calc PR .50 H C11 .2283(5) .8644(3) .72323(17) .0252(5) Uani d . 1 C H11 .0361 .8556 .7122 .030 Uiso calc R 1 H C12 .3589(5) .9458(3) .62729(18) .0261(5) Uani d . 1 C H12A .5494 .9556 .6400 .031 Uiso calc R 1 H C13 .3908(5) .8220(3) .53948(18) .0267(5) Uani d . 1 C H13A .2006 .8270 .5191 .032 Uiso calc R 1 H C14 .5358(5) .6246(3) .57024(17) .0240(5) Uani d . 1 C H14 .7399 .6123 .5748 .029 Uiso calc R 1 H C15 .4023(5) .5638(3) .67138(18) .0257(5) Uani d . 1 C H15 .2046 .5626 .6633 .031 Uiso calc R 1 H C16 .5586(5) .3770(3) .71122(19) .0308(5) Uani d . 1 C H16A .4577 .3432 .7739 .037 Uiso calc R 1 H H16B .5643 .2879 .6620 .037 Uiso calc R 1 H C21 .6823(5) .4790(3) .41185(17) .0255(5) Uani d . 1 C H21 .8679 .4975 .4243 .031 Uiso calc R 1 H C22 .7188(5) .2884(3) .37536(18) .0248(5) Uani d . 1 C H22A .5310 .2695 .3664 .030 Uiso calc R 1 H C23 .8990(5) .2733(3) .27375(19) .0269(5) Uani d . 1 C H23A 1.0823 .2971 .2847 .032 Uiso calc R 1 H C24 .7566(5) .4191(3) .19753(17) .0261(5) Uani d . 1 C H24A .8781 .4128 .1334 .031 Uiso calc R 1 H C25 .7163(5) .6050(3) .24124(18) .0273(5) Uani d . 1 C H25 .9040 .6239 .2504 .033 Uiso calc R 1 H C26 .5575(6) .7605(3) .1752(2) .0351(6) Uani d . 1 C H26A .6624 .7636 .1089 .042 Uiso calc R 1 H H26B .3712 .7430 .1658 .042 Uiso calc R 1 H O1 .8563(5) .5730(3) .89680(18) .0480(5) Uani d D 1 O H111 .803(10) .681(5) .879(4) .079(7) Uiso d D 1 H H112 .852(10) .526(6) .839(3) .079(7) Uiso d D 1 H O2 .3447(7) .5179(7) .9965(2) .1106(16) Uani d D 1 O H211 .207(9) .533(7) .959(4) .079(7) Uiso d D 1 H H212 .449(10) .572(6) .961(3) .079(7) Uiso d D 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 O12 .0510(11) .0211(8) .0357(9) .0040(7) -.0138(8) -.0071(7) O13 .0639(12) .0256(9) .0268(8) -.0191(8) .0016(8) -.0031(7) O14 .0364(9) .0248(8) .0269(8) -.0113(7) .0018(6) -.0083(6) O15 .0334(9) .0218(8) .0271(8) -.0018(6) -.0053(7) -.0037(6) O16 .0353(9) .0293(9) .0459(10) .0009(7) -.0099(8) -.0097(8) O17 .0294(9) .0588(13) .0570(12) -.0132(9) .0034(8) -.0208(10) O22 .0470(10) .0233(9) .0375(9) -.0064(7) -.0180(8) .0018(7) O23 .0360(9) .0196(8) .0486(10) -.0009(7) -.0042(8) -.0130(7) O24 .0362(9) .0337(9) .0312(9) -.0139(7) -.0082(7) .0000(7) O25 .0371(9) .0198(8) .0287(8) -.0008(7) .0001(7) -.0043(6) O26 .0398(11) .0190(8) .0786(15) -.0039(7) -.0078(10) -.0079(9) N1 .0275(9) .0273(10) .0317(10) -.0060(8) -.0054(8) -.0092(8) C1 .0296(13) .0267(12) .0324(12) -.0026(9) -.0020(10) -.0045(9) C2 .0557(19) .0562(18) .0409(15) -.0168(15) .0051(13) -.0220(14) C11 .0230(10) .0245(11) .0274(11) -.0023(8) -.0049(9) -.0065(9) C12 .0277(11) .0182(11) .0319(12) -.0013(9) -.0077(9) -.0050(9) C13 .0316(12) .0230(11) .0259(11) -.0073(9) -.0039(9) -.0012(9) C14 .0263(11) .0199(11) .0263(11) -.0057(8) -.0016(9) -.0056(9) C15 .0261(11) .0235(12) .0289(11) -.0076(9) -.0027(9) -.0044(9) C16 .0390(13) .0220(11) .0320(12) -.0083(10) -.0040(10) -.0018(9) C21 .0283(11) .0216(11) .0268(11) -.0060(9) -.0026(9) -.0034(9) C22 .0283(11) .0183(11) .0284(11) -.0047(9) -.0080(9) -.0018(8) C23 .0258(11) .0187(11) .0362(12) -.0027(9) -.0037(9) -.0096(9) C24 .0282(11) .0229(11) .0275(12) -.0072(9) .0009(9) -.0035(9) C25 .0308(12) .0218(11) .0297(12) -.0081(9) .0000(9) -.0028(9) C26 .0431(14) .0239(12) .0370(13) -.0070(10) -.0007(11) -.0014(10) O1 .0493(12) .0513(13) .0468(12) -.0157(10) -.0135(10) -.0002(10) O2 .0738(19) .224(5) .0530(16) -.081(3) -.0322(14) .056(2) loop_ _atom_type_symbol _atom_type_description _atom_type_scat_dispersion_real _atom_type_scat_dispersion_imag _atom_type_scat_source C C .0033 .0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' H H .0000 .0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' N N .0061 .0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4' O O .0106 .0060 '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 C12 O12 H12 109.5 ? C13 O13 H13 109.5 ? C21 O14 C14 117.37(18) y C11 O15 C15 111.98(18) y C16 O16 H16 109.5 ? C22 O22 H22 109.5 ? C23 O23 H23 109.5 ? C24 O24 H24 109.5 ? C21 O25 C25 113.61(18) y C26 O26 H26 109.5 ? C1 N1 C11 122.7(2) y C1 N1 H1 118.6 ? C11 N1 H1 118.6 ? O17 C1 N1 122.1(2) ? O17 C1 C2 121.5(2) ? N1 C1 C2 116.3(2) ? C1 C2 H2A 109.5 ? C1 C2 H2B 109.5 ? H2A C2 H2B 109.5 ? C1 C2 H2C 109.5 ? H2A C2 H2C 109.5 ? H2B C2 H2C 109.5 ? C1 C2 H2D 109.5 ? H2A C2 H2D 141.1 ? H2B C2 H2D 56.3 ? H2C C2 H2D 56.3 ? C1 C2 H2E 109.5 ? H2A C2 H2E 56.3 ? H2B C2 H2E 141.1 ? H2C C2 H2E 56.3 ? H2D C2 H2E 109.5 ? C1 C2 H2F 109.5 ? H2A C2 H2F 56.3 ? H2B C2 H2F 56.3 ? H2C C2 H2F 141.1 ? H2D C2 H2F 109.5 ? H2E C2 H2F 109.5 ? O15 C11 N1 107.11(19) y O15 C11 C12 109.43(19) ? N1 C11 C12 112.01(19) ? O15 C11 H11 109.4 ? N1 C11 H11 109.4 ? C12 C11 H11 109.4 ? O12 C12 C11 109.4(2) ? O12 C12 C13 112.00(19) ? C11 C12 C13 110.36(19) ? O12 C12 H12A 108.3 ? C11 C12 H12A 108.3 ? C13 C12 H12A 108.3 ? O13 C13 C12 106.64(19) ? O13 C13 C14 112.3(2) ? C12 C13 C14 111.35(19) ? O13 C13 H13A 108.8 ? C12 C13 H13A 108.8 ? C14 C13 H13A 108.8 ? O14 C14 C15 104.55(18) ? O14 C14 C13 111.98(19) ? C15 C14 C13 111.33(19) ? O14 C14 H14 109.6 ? C15 C14 H14 109.6 ? C13 C14 H14 109.6 ? O15 C15 C16 107.04(19) ? O15 C15 C14 110.06(18) ? C16 C15 C14 113.54(19) ? O15 C15 H15 108.7 ? C16 C15 H15 108.7 ? C14 C15 H15 108.7 ? O16 C16 C15 110.1(2) ? O16 C16 H16A 109.6 ? C15 C16 H16A 109.6 ? O16 C16 H16B 109.6 ? C15 C16 H16B 109.6 ? H16A C16 H16B 108.2 ? O14 C21 O25 107.14(19) ? O14 C21 C22 109.15(19) ? O25 C21 C22 109.68(19) ? O14 C21 H21 110.3 ? O25 C21 H21 110.3 ? C22 C21 H21 110.3 ? O22 C22 C23 111.0(2) ? O22 C22 C21 109.16(19) ? C23 C22 C21 108.39(19) ? O22 C22 H22A 109.4 ? C23 C22 H22A 109.4 ? C21 C22 H22A 109.4 ? O23 C23 C24 112.3(2) ? O23 C23 C22 111.9(2) ? C24 C23 C22 109.98(19) ? O23 C23 H23A 107.5 ? C24 C23 H23A 107.5 ? C22 C23 H23A 107.5 ? O24 C24 C23 107.2(2) ? O24 C24 C25 112.3(2) ? C23 C24 C25 108.3(2) ? O24 C24 H24A 109.7 ? C23 C24 H24A 109.7 ? C25 C24 H24A 109.7 ? O25 C25 C26 106.4(2) ? O25 C25 C24 109.92(18) ? C26 C25 C24 113.2(2) ? O25 C25 H25 109.1 ? C26 C25 H25 109.1 ? C24 C25 H25 109.1 ? O26 C26 C25 109.9(2) ? O26 C26 H26A 109.7 ? C25 C26 H26A 109.7 ? O26 C26 H26B 109.7 ? C25 C26 H26B 109.7 ? H26A C26 H26B 108.2 ? H111 O1 H112 99(5) ? H211 O2 H212 101(4) ? loop_ _geom_bond_atom_site_label_1 _geom_bond_atom_site_label_2 _geom_bond_distance _geom_bond_publ_flag O12 C12 1.418(3) ? O12 H12 .8200 ? O13 C13 1.421(3) ? O13 H13 .8200 ? O14 C21 1.384(3) y O14 C14 1.432(3) y O15 C11 1.417(3) y O15 C15 1.425(3) ? O16 C16 1.421(3) ? O16 H16 .8200 ? O17 C1 1.227(4) ? O22 C22 1.415(3) ? O22 H22 .8200 ? O23 C23 1.425(3) ? O23 H23 .8200 ? O24 C24 1.417(3) ? O24 H24 .8200 ? O25 C21 1.422(3) y O25 C25 1.434(3) ? O26 C26 1.423(3) ? O26 H26 .8200 ? N1 C1 1.334(3) y N1 C11 1.434(3) y N1 H1 .8600 ? C1 C2 1.491(4) ? C2 H2A .9600 ? C2 H2B .9600 ? C2 H2C .9600 ? C2 H2D .9600 ? C2 H2E .9600 ? C2 H2F .9600 ? C11 C12 1.520(3) ? C11 H11 .9800 ? C12 C13 1.524(3) ? C12 H12A .9800 ? C13 C14 1.529(4) ? C13 H13A .9800 ? C14 C15 1.518(3) ? C14 H14 .9800 ? C15 C16 1.512(4) y C15 H15 .9800 ? C16 H16A .9700 ? C16 H16B .9700 ? C21 C22 1.525(3) ? C21 H21 .9800 ? C22 C23 1.523(3) ? C22 H22A .9800 ? C23 C24 1.517(3) ? C23 H23A .9800 ? C24 C25 1.528(3) ? C24 H24A .9800 ? C25 C26 1.506(4) y C25 H25 .9800 ? C26 H26A .9700 ? C26 H26B .9700 ? O1 H111 .82(4) ? O1 H112 .88(4) ? O2 H211 .85(4) ? O2 H212 .82(4) ? 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 O12 H12 O22 1_465 .82 1.93 2.721(3) 161.7 y O13 H13 O25 . .82 2.06 2.767(3) 143.9 y O16 H16 O12 1_645 .82 1.93 2.749(4) 172.1 y O22 H22 O13 1_545 .82 1.96 2.767(4) 170.1 y O23 H23 O26 1_545 .82 1.97 2.753(4) 159.0 y O24 H24 O2 1_554 .82 1.86 2.675(3) 171.3 y O26 H26 O23 1_465 .82 1.90 2.716(5) 173.2 y N1 H1 O17 1_655 .86 2.10 2.849(4) 145.8 y O1 H111 O17 1_655 .82(4) 2.08(4) 2.872(5) 161(5) y O1 H112 O16 . .88(4) 1.91(4) 2.782(3) 168(4) y O2 H211 O1 1_455 .85(4) 1.91(4) 2.758(4) 170(5) y O2 H212 O1 . .82(4) 2.07(4) 2.804(5) 148(5) 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 C11 N1 C1 O17 -7.5(4) y C11 N1 C1 C2 173.0(2) y C15 O15 C11 N1 172.79(17) ? C15 O15 C11 C12 -65.6(2) ? C1 N1 C11 O15 -101.1(3) y C1 N1 C11 C12 139.0(2) ? O15 C11 C12 O12 -179.01(18) ? N1 C11 C12 O12 -60.4(2) ? O15 C11 C12 C13 57.4(2) ? N1 C11 C12 C13 175.97(19) ? O12 C12 C13 O13 65.7(3) ? C11 C12 C13 O13 -172.24(18) ? O12 C12 C13 C14 -171.50(19) ? C11 C12 C13 C14 -49.4(2) ? C21 O14 C14 C15 -157.80(18) y C21 O14 C14 C13 81.5(3) y O13 C13 C14 O14 -76.0(2) ? C12 C13 C14 O14 164.44(18) ? O13 C13 C14 C15 167.31(18) ? C12 C13 C14 C15 47.8(2) ? C11 O15 C15 C16 -172.56(18) ? C11 O15 C15 C14 63.6(2) ? O14 C14 C15 O15 -174.66(17) ? C13 C14 C15 O15 -53.6(2) ? O14 C14 C15 C16 65.4(2) ? C13 C14 C15 C16 -173.51(19) ? O15 C15 C16 O16 -59.3(2) y C14 C15 C16 O16 62.3(3) ? C14 O14 C21 O25 -89.3(2) y C14 O14 C21 C22 151.96(19) ? C25 O25 C21 O14 -179.43(17) ? C25 O25 C21 C22 -61.1(2) ? O14 C21 C22 O22 -63.8(2) ? O25 C21 C22 O22 179.09(18) ? O14 C21 C22 C23 175.18(18) ? O25 C21 C22 C23 58.1(2) ? O22 C22 C23 O23 56.6(3) ? C21 C22 C23 O23 176.47(18) ? O22 C22 C23 C24 -177.82(18) ? C21 C22 C23 C24 -57.9(2) ? O23 C23 C24 O24 61.4(2) ? C22 C23 C24 O24 -63.9(2) ? O23 C23 C24 C25 -177.19(18) ? C22 C23 C24 C25 57.5(2) ? C21 O25 C25 C26 -176.39(19) ? C21 O25 C25 C24 60.7(2) ? O24 C24 C25 O25 61.0(2) ? C23 C24 C25 O25 -57.2(2) ? O24 C24 C25 C26 -57.8(2) ? C23 C24 C25 C26 -176.0(2) ? O25 C25 C26 O26 58.3(2) y C24 C25 C26 O26 179.1(2) ?