Tetranortriterpenoids from the Leaves of Cipadessa cinerascens.
Fang, Xin; Di, Ying-Tong; Li, Chun-Shun; Geng, Zhao-Liang; Zhang, Zhen; Zhang, Yu; Lu, Yang; Zheng, Qi-Tai; Yang, Shi-Yin; Hao, Xiao-Jiang; Journal of natural products 72 (2009) 714–718; doi:10.1021/np800656r

data_1503683
_publ_section_title
;
 Tetranortriterpenoids from the Leaves of Cipadessa cinerascens.
;
_journal_issue                   4
_journal_name_full               'Journal of natural products'
_journal_page_first              714
_journal_page_last               718
_journal_paper_doi               10.1021/np800656r
_journal_volume                  72
_journal_year                    2009
_chemical_absolute_configuration unk
_chemical_formula_moiety         '2(C32 H40 O10)'
_chemical_formula_sum            'C32 H40 O10'
_chemical_formula_weight         584.64
_chemical_name_systematic
; 
 ? 
;
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 110.71
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.991
_cell_length_b                   9.914
_cell_length_c                   19.319
_cell_measurement_reflns_used    11368
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      25.54
_cell_measurement_theta_min      2.16
_cell_volume                     3043.979
_computing_cell_refinement       'SCALE(Otwinowski & Minor,1996)'
_computing_data_collection       'DENZO(Otwinowski & Minor,1996)'
_computing_data_reduction        'SCALE(Otwinowski & Minor,1996)'
_computing_molecular_graphics
'SHELXL97 (Sheldrick, 1997) and PLUTON(Spek,2003)'
_computing_publication_material  'SHELXL97(Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'mac dip 2030b'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0418
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            5944
_diffrn_reflns_theta_full        25.54
_diffrn_reflns_theta_max         25.54
_diffrn_reflns_theta_min         2.16
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1228
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.641
_refine_diff_density_min         -0.217
_refine_diff_density_rms         0.055
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.7(15)
_refine_ls_extinction_coef       0.0168(19)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     766
_refine_ls_number_reflns         5944
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0825
_refine_ls_R_factor_gt           0.0615
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1072P)^2^+0.9921P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1561
_refine_ls_wR_factor_ref         0.1755
_reflns_number_gt                4634
_reflns_number_total             5944
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            np800656r_si_001.cif
_cod_data_source_block           a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3044.0
_cod_original_sg_symbol_Hall     P2yb
_cod_original_sg_symbol_H-M      P21
_cod_database_code               1503683