Virosaines A and B, two new birdcage-shaped Securinega alkaloids with an unprecedented skeleton from Flueggea virosa.
Zhao, Bing-Xin; Wang, Ying; Zhang, Dong-Mei; Huang, Xiao-Jun; Bai, Liang-Liang; Yan, Yan; Chen, Jia-Mei; Lu, Tong-Bu; Wang, Yi-Tao; Zhang, Qing-Wen; Ye, Wen-Cai; Organic letters 14 (2012) 3096–3099; doi:10.1021/ol301184j

data_1507825
_publ_section_title
;
 Virosaines A and B, two new birdcage-shaped Securinega alkaloids with an
 unprecedented skeleton from Flueggea virosa.
;
_journal_issue                   12
_journal_name_full               'Organic letters'
_journal_page_first              3096
_journal_page_last               3099
_journal_paper_doi               10.1021/ol301184j
_journal_volume                  14
_journal_year                    2012
_chemical_absolute_configuration rm
_chemical_formula_sum            'C12 H13 N O4'
_chemical_formula_weight         235.23
_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                 96.541(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.1645(4)
_cell_length_b                   8.6050(3)
_cell_length_c                   11.9296(5)
_cell_measurement_reflns_used    8424
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      66.7797
_cell_measurement_theta_min      3.7264
_cell_volume                     1036.64(7)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.5058
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0480
_diffrn_reflns_av_sigmaI/netI    0.0274
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            21623
_diffrn_reflns_theta_full        66.89
_diffrn_reflns_theta_max         66.89
_diffrn_reflns_theta_min         3.73
_exptl_absorpt_coefficient_mu    0.956
_exptl_absorpt_correction_T_max  0.9275
_exptl_absorpt_correction_T_min  0.8319
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            White
_exptl_crystal_density_diffrn    1.507
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             496
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.184
_refine_diff_density_min         -0.182
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.01(16)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     411
_refine_ls_number_reflns         3677
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0377
_refine_ls_R_factor_gt           0.0330
_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^)+(0.0429P)^2^+0.1819P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0770
_refine_ls_wR_factor_ref         0.0800
_reflns_number_gt                3388
_reflns_number_total             3677
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol301184j_si_002.cif
_cod_data_source_block           0712_yy_fva_8_32
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 1891 2012-01-12 08:04:46Z andrius 

 Adding full bibliography for 1507825.cif.
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               1507825