Isolation and structure of providencin: a highly oxygenated diterpene possessing a unique bicyclo[12.2.0]hexadecane ring system from the sea plume Pseudopterogorgia kallos.
Marrero, Jeffrey; Rodríguez, Abimael D; Baran, Peter; Raptis, Raphael G.; Organic letters 5 (2003) 2551–2554; doi:10.1021/ol034833g

data_1507344
_publ_section_title
;
 Isolation and structure of providencin: a highly oxygenated diterpene
 possessing a unique bicyclo[12.2.0]hexadecane ring system from the sea
 plume Pseudopterogorgia kallos.
;
_journal_issue                   14
_journal_name_full               'Organic letters'
_journal_page_first              2551
_journal_page_last               2554
_journal_paper_doi               10.1021/ol034833g
_journal_volume                  5
_journal_year                    2003
_chemical_formula_sum            'C23 H24 O10'
_chemical_formula_weight         460.42
_space_group_IT_number           19
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0609(13)
_cell_length_b                   9.6281(14)
_cell_length_c                   24.800(4)
_cell_measurement_temperature    298(2)
_cell_volume                     2163.5(6)
_computing_cell_refinement       'BRUKER SMART-NT V5.0'
_computing_data_collection       'BRUKER SMART-NT V5.0'
_computing_data_reduction        'BRUKER SAINT-NT V5/6.0'
_computing_molecular_graphics    'BRUKER SHELXTL-NT V5.1'
_computing_publication_material  'BRUKER SHELXTL-NT V5.1'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker AXS SMART CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0591
_diffrn_reflns_av_sigmaI/netI    0.0849
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            15255
_diffrn_reflns_theta_full        28.06
_diffrn_reflns_theta_max         28.06
_diffrn_reflns_theta_min         1.64
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       polyhedron
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.6(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.914
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     302
_refine_ls_number_reflns         5236
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.914
_refine_ls_R_factor_all          0.1244
_refine_ls_R_factor_gt           0.0436
_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^)+(0.0440P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0829
_refine_ls_wR_factor_ref         0.1046
_reflns_number_gt                2543
_reflns_number_total             5236
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol034833gsi20030529_122534.cif
_cod_data_source_block           ar030
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        2163.5(5)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1507344