Ibogan, Aspidosperman, Vincamine, and Bisindole Alkaloids from a Malayan Tabernaemontana corymbosa: Iboga Alkaloids with C-20α Substitution.
Nge, Choy-Eng; Chong, Kam-Weng; Thomas, Noel F.; Lim, Siew-Huah; Low, Yun-Yee; Kam, Toh-Seok; Journal of natural products 79 (2016) 1388–1399; doi:10.1021/acs.jnatprod.6b00129

data_1543450
_publ_section_title
;
 Ibogan, Aspidosperman, Vincamine, and Bisindole Alkaloids from a Malayan
 Tabernaemontana corymbosa: Iboga Alkaloids with C-20\a Substitution.
;
_journal_issue                   5
_journal_name_full               'Journal of natural products'
_journal_page_first              1388
_journal_page_last               1399
_journal_paper_doi               10.1021/acs.jnatprod.6b00129
_journal_volume                  79
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C19 H20 N2 O2'
_chemical_formula_sum            'C19 H20 N2 O2'
_chemical_formula_weight         308.37
_chemical_name_common            'Conoduzidine A'
_chemical_temperature_decomposition_gt 525
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   '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            8
_cell_length_a                   11.73280(10)
_cell_length_b                   13.07670(10)
_cell_length_c                   19.2454(2)
_cell_measurement_reflns_used    7695
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      74.1647
_cell_measurement_theta_min      3.3769
_cell_volume                     2952.75(5)
_computing_cell_refinement       'CrysAlis PRO'
_computing_data_collection       'CrysAlis PRO  (Agilent, 2010)'
_computing_data_reduction        'CrysAlis PRO'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material
'enCIFer (Allen, et. al., J. Applied Cryst., 37, 335-338, 2004)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.4041
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type
'Agilent Technologies SuperNova Dual diffractometer with Atlas detector'
_diffrn_measurement_method       '\w scan'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0163
_diffrn_reflns_av_unetI/netI     0.0214
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10671
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.976
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         74.333
_diffrn_reflns_theta_min         4.087
_diffrn_source                   'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.725
_exptl_absorpt_correction_T_max  0.8686
_exptl_absorpt_correction_T_min  0.7603
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlis PRO (Agilent, 2010)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.387
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.305
_refine_diff_density_min         -0.178
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details
;
 Flack x determined using 2424 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.06(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5866
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0358
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0420P)^2^+0.9350P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0898
_refine_ls_wR_factor_ref         0.0901
_reflns_Friedel_coverage         0.755
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.958
_reflns_number_gt                5788
_reflns_number_total             5866
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np6b00129_si_006.cif
_cod_data_source_block           Conoduzidine_A
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' tag was changed to
'_chemical_temperature_decomposition_gt' since the value was
specified 'more than' ('>') a certain temperature. The value '>525 K
(dec)' was changed to '525' - it should be numeric and without a unit
designator.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_database_code               1543450
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.760
_shelx_estimated_absorpt_t_max   0.869
_shelx_res_checksum              68075
_shelx_hkl_checksum              87016