Dammarane-Type Triterpenoids from Gentianella azurea.
Huang, Yu-Jie; Lu, Hui; Yu, Xue-Li; Zhang, Shu-Wei; Wang, Wen-Qiong; Fen, Lin-Yin; Xuan, Li-Jiang; Journal of natural products 77 (2014) 1201–; doi:10.1021/np500077z

data_1516023
_publ_section_title
;
 Dammarane-Type Triterpenoids from Gentianella azurea.
;
_journal_issue                   5
_journal_name_full               'Journal of natural products'
_journal_page_first              1201
_journal_paper_doi               10.1021/np500077z
_journal_volume                  77
_journal_year                    2014
_chemical_absolute_configuration ad
_chemical_formula_sum            'C32 H60 O10'
_chemical_formula_weight         604.80
_chemical_name_systematic
; 
 ? 
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           18
_space_group_name_Hall           'P 2 2ab'
_space_group_name_H-M_alt        'P 21 21 2'
_symmetry_space_group_name_Hall  'P 2 2ab'
_symmetry_space_group_name_H-M   'P 21 21 2'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.2093(3)
_cell_length_b                   38.8302(9)
_cell_length_c                   7.2838(2)
_cell_measurement_reflns_used    6803
_cell_measurement_temperature    140(2)
_cell_measurement_theta_max      69.08
_cell_measurement_theta_min      3.41
_cell_volume                     3170.34(14)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      140(2)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0468
_diffrn_reflns_av_unetI/netI     0.0457
_diffrn_reflns_Laue_measured_fraction_full 0.965
_diffrn_reflns_Laue_measured_fraction_max 0.958
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       47
_diffrn_reflns_limit_k_min       -46
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            17922
_diffrn_reflns_point_group_measured_fraction_full 0.962
_diffrn_reflns_point_group_measured_fraction_max 0.950
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         69.623
_diffrn_reflns_theta_min         2.276
_exptl_absorpt_coefficient_mu    0.751
_exptl_absorpt_correction_T_max  0.75
_exptl_absorpt_correction_T_min  0.59
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.267
_exptl_crystal_description       block
_exptl_crystal_F_000             1328
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.130
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.823
_refine_diff_density_min         -0.927
_refine_diff_density_rms         0.103
_refine_ls_abs_structure_details
; 
 Flack x determined using 2225 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons and Flack (2004), Acta Cryst. A60, s61). 
;
_refine_ls_abs_structure_Flack   0.24(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.153
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     390
_refine_ls_number_reflns         5668
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.199
_refine_ls_R_factor_all          0.0844
_refine_ls_R_factor_gt           0.0822
_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^)+(0.1262P)^2^+4.8755P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2311
_refine_ls_wR_factor_ref         0.2343
_reflns_Friedel_coverage         0.725
_reflns_Friedel_fraction_full    0.958
_reflns_Friedel_fraction_max     0.940
_reflns_number_gt                5471
_reflns_number_total             5668
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np500077z_si_005.cif
_cod_data_source_block           dm13493
_cod_depositor_comments
'Adding full bibliography for 1516020--1516024.cif.'
_cod_database_code               1516023
_shelx_estimated_absorpt_t_min   0.829
_shelx_estimated_absorpt_t_max   0.942
_shelxl_version_number           2013-4
_shelx_res_checksum              25656
_shelx_hkl_checksum              81087