4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octadecahydro-12b,8a-(epoxymethano)picen-3-yl acetate
Nisar, Mohammad; Ali, Sajid; Tahir, M. Nawaz; Ahmad, Bashir; Hameed, Shahid; Acta Crystallographica Section E 69 (2013) o573–; doi:10.1107/S1600536813007253

data_2237633
_publ_section_title
;
 4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octadecahydro-12b,8a-(epoxymethano)picen-3-yl
 acetate
;
_journal_coeditor_code           HB7057
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o573
_journal_paper_doi               10.1107/S1600536813007253
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C32 H48 O4'
_chemical_formula_moiety         'C32 H48 O4'
_chemical_formula_sum            'C32 H48 O4'
_chemical_formula_weight         496.70
_chemical_name_common
;4,5,9,9,13,19,20-Heptamethyl-23-oxo-24-
oxahexacyclo[15.5.2.0^1,18^.0^4,17^.0^5,14^.0^8,13^]tetracos-
15-en-10-yl acetate
;
_chemical_name_systematic
'4,4,6a,6b,11,12,14b-Heptamethyl-16-oxo-1,2,3,4,4a,5,6,6a,6b,7,8,9,10,11,12,12a,14a,14b-octadecahydro-12b,8a-(epoxymethano)picen-3-yl acetate'
_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
_cell_angle_beta                 90.943(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   13.7309(8)
_cell_length_b                   6.9177(4)
_cell_length_c                   14.8539(9)
_cell_measurement_reflns_used    2261
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25.25
_cell_measurement_theta_min      2.74
_cell_volume                     1410.73(14)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX2 (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics
'ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009)'
_computing_publication_material
;
WinGX (Farrugia, 2012) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.10
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0289
_diffrn_reflns_av_sigmaI/netI    0.0306
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            11401
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.74
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.975
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.169
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             544
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.151
_refine_diff_density_min         -0.151
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     333
_refine_ls_number_reflns         2856
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0565
_refine_ls_R_factor_gt           0.0406
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0488P)^2^+0.1608P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0919
_refine_ls_wR_factor_ref         0.1008
_reflns_number_gt                2261
_reflns_number_total             2856
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb7057.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               2237633
_cod_database_fobs_code          2237633