(1<i>S*</i>,2<i>S*</i>,5<i>R*</i>,8<i>S*</i>,11<i>S*</i>,14<i>R*</i>,17<i>S*</i>,20<i>R*</i>)-14-Methyl-6-methylene-10,16,18-trioxahexacyclo[12.5.1.1^5,8^.0^1,11^.0^2,8^.0^17,20^]henicosane-7,9-dione: natural diterpenoid macrocalyxoformin B
Shi, Hao; Acta Crystallographica Section E 64 (2008) o79–o79; doi:10.1107/S1600536807060692

data_2217008
_publ_section_title
;(1<i>S*</i>,2<i>S*</i>,5<i>R*</i>,8<i>S*</i>,11<i>S*</i>,14<i>R*</i>,17<i>S*</i>,20<i>R*</i>)-14-Methyl-6-methylene-10,16,18-trioxahexacyclo[12.5.1.1^5,8^.0^1,11^.0^2,8^.0^17,20^]henicosane-7,9-dione:
 natural diterpenoid macrocalyxoformin B
;
_journal_coeditor_code           DN2278
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o79
_journal_page_last               o79
_journal_paper_doi               10.1107/S1600536807060692
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H24 O5'
_chemical_formula_moiety         'C20 H24 O5'
_chemical_formula_sum            'C20 H24 O5'
_chemical_formula_weight         344.39
_chemical_name_common            'macrocalyxoformin B'
_chemical_name_systematic
;
(1<i>S*</i>,2<i>S*</i>,5<i>R*</i>,8<i>S*</i>,11<i>S*</i>,14<i>R*</i>,
17<i>S*</i>,20<i>R*</i>)-14-Methyl-6-methylene-10,16,18-
trioxahexacyclo[12.5.1.1^5,8^.0^1,11^.0^2,8^.0^17,20^]henicosane-7,9-dione
;
_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                   7.8450(10)
_cell_length_b                   13.1365(17)
_cell_length_c                   16.178(2)
_cell_measurement_reflns_used    1585
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.858
_cell_measurement_theta_min      2.495
_cell_volume                     1667.2(4)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \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  0.1513
_diffrn_reflns_av_sigmaI/netI    0.0860
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7324
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9874
_exptl_absorpt_correction_T_min  0.9807
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 1999)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.372
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.271
_refine_diff_density_min         -0.230
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.993
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         1707
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.993
_refine_ls_R_factor_all          0.0934
_refine_ls_R_factor_gt           0.0623
_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^)+(0.0846P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1421
_refine_ls_wR_factor_ref         0.1586
_reflns_number_gt                1158
_reflns_number_total             1707
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            dn2278.cif
_cod_data_source_block           I
_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_enum 1527 2010-12-29 10:47:43Z saulius 

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_database_code               2217008
_cod_database_fobs_code          2217008