Epimeric Excolides from the Stems of Excoecaria agallocha and Structural Revision of Rhizophorin A.
Annam, S Ch V Appa Rao; Ankireddy, Madhu; Sura, Madhu Babu; Ponnapalli, Mangala Gowri; Sarma, Akella V. S.; S, Jeelani Basha; Organic letters 17 (2015) 2840–2843; doi:10.1021/acs.orglett.5b01257

data_1519999
_publ_section_title
;
 Epimeric Excolides from the Stems of Excoecaria agallocha and Structural
 Revision of Rhizophorin A.
;
_journal_issue                   11
_journal_name_full               'Organic letters'
_journal_page_first              2840
_journal_page_last               2843
_journal_paper_doi               10.1021/acs.orglett.5b01257
_journal_volume                  17
_journal_year                    2015
_chemical_absolute_configuration rm
_chemical_formula_sum            'C20 H28 O5'
_chemical_formula_weight         348.42
_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                 91.432(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.4777(6)
_cell_length_b                   7.3392(3)
_cell_length_c                   13.4089(6)
_cell_measurement_reflns_used    1559
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.3172
_cell_measurement_theta_min      3.1385
_cell_volume                     932.41(8)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_measurement_method       '\w 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  0.0162
_diffrn_reflns_av_sigmaI/netI    0.0459
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            3886
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         3.04
_exptl_absorpt_coefficient_mu    0.088
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.72802
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.241
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.121
_refine_diff_density_min         -0.141
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.6(12)
_refine_ls_extinction_coef       0.015(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         3166
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0595
_refine_ls_R_factor_gt           0.0440
_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^)+(0.0384P)^2^+0.0056P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0866
_refine_ls_wR_factor_ref         0.0961
_reflns_number_gt                2535
_reflns_number_total             3166
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b01257_si_002.cif
_cod_data_source_block           C-33
_cod_depositor_comments
'Adding full bibliography for 1519998--1519999.cif.'
_cod_database_code               1519999