6-Methoxy-4,5-di(methoxycarbonyl)-2-(2,3,4-tri-<i>O</i>-acetyl-β-<small>D</small>-xylopyranosyl)aminopyridine and 4,5-Di(methoxycarbonyl)-6-methylthio-2-(2,3,4-tri-<i>O</i>-acetyl-β-<small>D</small>-xylopyranosyl)aminopyridine
Low, J. N.; Ferguson, G.; Cobo, J.; Melguizo, M.; Nogueras, M.; Sánchez, A.; Acta Crystallographica Section C 52 (1996) 145–148; doi:10.1107/S0108270195012583

data_2004341
_publ_section_title
;6-Methoxy-4,5-di(methoxycarbonyl)-2-(2,3,4-tri-<i>O</i>-acetyl-\b-<small>D</small>-xylopyranosyl)aminopyridine
 and
 4,5-Di(methoxycarbonyl)-6-methylthio-2-(2,3,4-tri-<i>O</i>-acetyl-\b-<small>D</small>-xylopyranosyl)aminopyridine
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              145
_journal_page_last               148
_journal_paper_doi               10.1107/S0108270195012583
_journal_volume                  52
_journal_year                    1996
_chemical_formula_moiety         'C21 H26 N2 O12'
_chemical_formula_sum            'C21 H26 N2 O12'
_chemical_formula_weight         498.44
_chemical_name_systematic
;
2-(2,3,4-tri-O-acetyl-\b-D-xylopyranosyl)amino-4,5-dicarbomethoxy-6-methoxy-
pyridine
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_cell_angle_alpha                90
_cell_angle_beta                 96.24(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.8019(10)
_cell_length_b                   15.889(2)
_cell_length_c                   10.202(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    294.0(10)
_cell_measurement_theta_max      16.5
_cell_measurement_theta_min      9.5
_cell_volume                     1257.2(3)
_computing_cell_refinement
'Enraf-Nonius SET4 (de Boer & Duisenberg, 1984) and CELDIM'
_computing_data_collection       'CAD-4/PC Software (Enraf-Nonius, 1992)'
_computing_data_reduction
'DATRD2 in NRCVAX94 (Gabe, Le Page, Charland, Lee & White, 1989)'
_computing_molecular_graphics    'NRCVAX94, PLATON and PLUTON'
_computing_publication_material  'NRCVAX94, SHELXL93  and WordPerfect'
_computing_structure_refinement  'NRCVAX94 and SHELXL93 (Sheldrick, 1993)'
_computing_structure_solution    'SOLVER in NRCVAX'
_diffrn_ambient_temperature      294.0(10)
_diffrn_measurement_device       'Enraf-Nonius CAD-4'
_diffrn_measurement_method       \q/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.014
_diffrn_reflns_av_sigmaI/netI    0.0371
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3015
_diffrn_reflns_theta_max         26.9
_diffrn_reflns_theta_min         2.0
_diffrn_standards_decay_%        'no decay, variation 0.8'
_diffrn_standards_interval_time  120
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_meas      ?
_exptl_crystal_description       prism
_exptl_crystal_F_000             524
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.127
_refine_ls_abs_structure_details 'Flack (1983) parameter = 0.10(13)'
_refine_ls_abs_structure_Flack   0.1(13)
_refine_ls_extinction_coef       0.009(2)
_refine_ls_extinction_method     SHELXL93
_refine_ls_goodness_of_fit_all   1.009
_refine_ls_goodness_of_fit_obs   1.180
_refine_ls_hydrogen_treatment
'H atoms riding (SHELXL93 defaults, C---H 0.96--0.98, N---H 0.86\%A)'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     317
_refine_ls_number_reflns         2827
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.009
_refine_ls_restrained_S_obs      1.180
_refine_ls_R_factor_all          0.0747
_refine_ls_R_factor_obs          0.0417
_refine_ls_shift/esd_max         0.001
_refine_ls_shift/esd_mean        0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_scheme
;
calc w = 1/[\s^2^(F~o~^2^) + (0.0544P)^2^]
where P = (F~o~^2^ + 2F~c~^2^)/3
;
_refine_ls_wR_factor_all         0.1028
_refine_ls_wR_factor_obs         0.0932
_reflns_number_observed          1818
_reflns_number_total             2827
_reflns_observed_criterion       >2\s(I)
_cod_data_source_file            ab1310.cif
_cod_data_source_block           III
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2004341