Crotonols A and B, two rare tigliane diterpenoid derivatives against K562 cells from Croton tiglium.
Wang, Junfeng; Qin, Li; Zhao, Biqing; Cai, Liang; Zhong, Zhenping; Liu, Yonghong; Zhou, Xiaojiang; Organic & biomolecular chemistry 17 (2018) 195–202; doi:10.1039/c8ob02519c

data_7156606
_publ_section_title
;
 Crotonols A and B, two rare tigliane diterpenoid derivatives against K562
 cells from Croton tiglium.
;
_journal_issue                   1
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              195
_journal_page_last               202
_journal_paper_doi               10.1039/c8ob02519c
_journal_volume                  17
_journal_year                    2018
_chemical_formula_sum            'C20 H32 O11'
_chemical_formula_weight         448.46
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-02-09 deposited with the CCDC.
2018-12-05 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.9268(4)
_cell_length_b                   7.6212(4)
_cell_length_c                   39.643(3)
_cell_measurement_reflns_used    1863
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      64.9950
_cell_measurement_theta_min      4.4640
_cell_volume                     2092.8(2)
_computing_cell_refinement       'Bruker FRAMBO'
_computing_data_collection       'Bruker FRAMBO'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0811
_diffrn_reflns_av_sigmaI/netI    0.0792
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       45
_diffrn_reflns_limit_l_min       -46
_diffrn_reflns_number            12982
_diffrn_reflns_theta_full        66.05
_diffrn_reflns_theta_max         66.05
_diffrn_reflns_theta_min         4.46
_exptl_absorpt_coefficient_mu    0.987
_exptl_absorpt_correction_T_max  0.8502
_exptl_absorpt_correction_T_min  0.7976
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.423
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.321
_refine_diff_density_min         -0.331
_refine_diff_density_rms         0.067
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(5)
_refine_ls_extinction_coef       0.0024(3)
_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   1.097
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     286
_refine_ls_number_reflns         3638
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.1013
_refine_ls_R_factor_gt           0.0777
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+3.1861P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1777
_refine_ls_wR_factor_ref         0.1902
_reflns_number_gt                2657
_reflns_number_total             3638
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c8ob02519c2.cif
_cod_data_source_block           160313a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 7156606.cif.
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7156606