Antinociceptive Grayanane Diterpenoids from the Leaves of <i>Pieris japonica</i>.
Zheng, Guijuan; Zhou, Junfei; Huang, Lang; Zhang, Hao; Sun, Na; Zhang, Hanqi; Jin, Pengfei; Yue, Mingbo; Meng, Lingkui; Yao, Guangmin; Journal of natural products 82 (2019) 3330–3339; doi:10.1021/acs.jnatprod.9b00569

data_1556572
_publ_section_title
;
 Antinociceptive Grayanane Diterpenoids from the Leaves of <i>Pieris
 japonica</i>.
;
_journal_issue                   12
_journal_name_full               'Journal of natural products'
_journal_page_first              3330
_journal_page_last               3339
_journal_paper_doi               10.1021/acs.jnatprod.9b00569
_journal_volume                  82
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         ' C20 H32 O4, H2 O'
_chemical_formula_sum            'C20 H34 O5'
_chemical_formula_weight         354.47
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.4945(3)
_cell_length_b                   11.4293(5)
_cell_length_c                   24.7998(11)
_cell_measurement_reflns_used    8507
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      66.69
_cell_measurement_theta_min      3.56
_cell_volume                     1840.83(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-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0397
_diffrn_reflns_av_unetI/netI     0.0258
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            15631
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        66.716
_diffrn_reflns_theta_max         66.716
_diffrn_reflns_theta_min         3.564
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.726
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.279
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.05
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.145
_refine_diff_density_min         -0.154
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.0(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.045
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     241
_refine_ls_number_reflns         3259
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0313
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0387P)^2^+0.3381P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0742
_refine_ls_wR_factor_ref         0.0769
_reflns_Friedel_coverage         0.711
_reflns_Friedel_fraction_full    1.001
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                3010
_reflns_number_total             3259
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np9b00569_si_003.cif
_cod_data_source_block           a
_cod_depositor_comments
'Adding full bibliography for 1556567--1556572.cif.'
_cod_original_formula_sum        ' C20 H34 O5'
_cod_database_code               1556572
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              95212
_shelx_hkl_checksum              87773