Ophiosphaerellins A-I, Polyketide-Derived Compounds from the Endolichenic Fungus <i>Ophiosphaerella korrae</i>.
Li, Yuelan; Zhu, Rongxiu; Zhang, Jiaozhen; Xie, Fei; Wang, Xiaoning; Xu, Ke; Qiao, Yanan; Zhao, Zuntian; Lou, Hongxiang; ACS omega 3 (2018) 176–180; doi:10.1021/acsomega.7b01668

data_4515910
_publ_section_title
;
 Ophiosphaerellins A-I, Polyketide-Derived Compounds from the Endolichenic
 Fungus <i>Ophiosphaerella korrae</i>.
;
_journal_issue                   1
_journal_name_full               'ACS omega'
_journal_page_first              176
_journal_page_last               180
_journal_paper_doi               10.1021/acsomega.7b01668
_journal_volume                  3
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         C14H20O4
_chemical_formula_sum            'C14 H20 O4'
_chemical_formula_weight         252.30
_chemical_name_common            2OK-1
_chemical_name_systematic        2OK-1
_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   geom
_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                   9.0317(5)
_cell_length_b                   10.0478(5)
_cell_length_c                   15.5635(8)
_cell_measurement_reflns_used    4094
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      142.321
_cell_measurement_theta_min      10.459
_cell_volume                     1412.37(13)
_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-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1954
_diffrn_reflns_av_unetI/netI     0.1418
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.991
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            12474
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.465
_diffrn_reflns_theta_min         5.240
_exptl_absorpt_coefficient_mu    0.705
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.187
_exptl_crystal_description       needle
_exptl_crystal_F_000             544
_refine_diff_density_max         0.636
_refine_diff_density_min         -0.485
_refine_diff_density_rms         0.138
_refine_ls_abs_structure_details
;
 Flack x determined using 544 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.7(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.110
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     169
_refine_ls_number_reflns         2768
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.110
_refine_ls_R_factor_all          0.1508
_refine_ls_R_factor_gt           0.1282
_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^)+(0.2000P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2979
_refine_ls_wR_factor_ref         0.3227
_reflns_Friedel_coverage         0.721
_reflns_Friedel_fraction_full    0.990
_reflns_Friedel_fraction_max     0.986
_reflns_number_gt                2021
_reflns_number_total             2768
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao7b01668_si_002.cif
_cod_data_source_block           cu_20170418A_0m_a
_cod_database_code               4515910
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              86892
_shelx_hkl_checksum              57261