Virgatolides A‒C, Benzannulated Spiroketals from the Plant Endophytic Fungus Pestalotiopsis virgatula
Li, Jian; Li, Li; Si, Yikang; Jiang, Xuejun; Guo, Liangdong; Che, Yongsheng; Organic letters 13 (2011) 2670–2673; doi:10.1021/ol200770k

data_1513318
_publ_section_title
;
 Virgatolides A--C, Benzannulated Spiroketals from the Plant Endophytic
 Fungus Pestalotiopsis virgatula
;
_journal_coden_ASTM              ORLEF7
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2670
_journal_page_last               2673
_journal_paper_doi               10.1021/ol200770k
_journal_volume                  13
_journal_year                    2011
_chemical_absolute_configuration ad
_chemical_formula_moiety         '2(C22 H26 O9), 2(C H4 O), H2 O'
_chemical_formula_sum            'C23 H31 O10.5'
_chemical_formula_weight         475.48
_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                90.00
_cell_angle_beta                 92.794(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.481(4)
_cell_length_b                   15.622(6)
_cell_length_c                   12.848(5)
_cell_measurement_reflns_used    617
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.17
_cell_volume                     2301.6(15)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 200)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'MM007-HF CCD(Saturn 724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0723
_diffrn_reflns_av_sigmaI/netI    0.0734
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            24462
_diffrn_reflns_theta_full        25.37
_diffrn_reflns_theta_max         25.37
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.9967
_exptl_absorpt_correction_T_min  0.9744
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2007)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.372
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             1012
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.446
_refine_diff_density_min         -0.313
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.4(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     611
_refine_ls_number_reflns         8448
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0539
_refine_ls_R_factor_gt           0.0469
_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^)+(0.0350P)^2^+0.1995P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1051
_refine_ls_wR_factor_ref         0.1081
_reflns_number_gt                7535
_reflns_number_total             8448
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             1502178
_cod_data_source_file            ol200770ksup1.cif
_cod_data_source_block           mx450
_cod_original_cell_volume        2301.6(14)
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1513318