Artatrovirenols A and B: Two Cagelike Sesquiterpenoids from Artemisia atrovirens
Su, Li-Hua; Geng, Chang-An; Li, Tian-Ze; Ma, Yun-Bao; Huang, Xiao-Yan; Zhang, Xue-Mei; Chen, Ji-Jun; The Journal of Organic Chemistry  (2020) –; doi:10.1021/acs.joc.0c01491

data_4038920
_publ_section_title
;
 Artatrovirenols A and B: Two Cagelike Sesquiterpenoids from Artemisia
 atrovirens
;
_journal_name_full               'The Journal of Organic Chemistry'
_journal_paper_doi               10.1021/acs.joc.0c01491
_journal_year                    2020
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C15 H18 O4'
_chemical_formula_sum            'C15 H18 O4'
_chemical_formula_weight         262.29
_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
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.5399(2)
_cell_length_b                   9.9824(2)
_cell_length_c                   13.6680(3)
_cell_measurement_reflns_used    9879
_cell_measurement_temperature    100.(2)
_cell_measurement_theta_max      72.1174
_cell_measurement_theta_min      5.4877
_cell_volume                     1301.62(5)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_collection       'Bruker Instrument Service vV6.2.9'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100.(2)
_diffrn_detector_area_resol_mean 7.3910
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker D8 QUEST PHOTON II'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'Helixos MX multilayer Optic'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0386
_diffrn_reflns_av_unetI/netI     0.0281
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            13898
_diffrn_reflns_theta_full        72.33
_diffrn_reflns_theta_max         72.33
_diffrn_reflns_theta_min         5.49
_diffrn_source                   'Ius Diamond'
_diffrn_source_type              Microfocus
_exptl_absorpt_coefficient_mu    0.792
_exptl_absorpt_correction_T_max  0.95
_exptl_absorpt_correction_T_min  0.68
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction 
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_density_diffrn    1.338
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.249
_refine_diff_density_min         -0.300
_refine_ls_abs_structure_details
; 
  
Flack x determined using 1059 quotients [(I+)-(I-)]/[(I+)+(I-)] 
(Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.06(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.097
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     176
_refine_ls_number_reflns         2554
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.0308
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0484P)^2^+0.2619P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0804
_refine_ls_wR_factor_ref         0.0808
_reflns_number_gt                2533
_reflns_number_total             2554
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c01491_si_002.cif
_cod_data_source_block           jar127b
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-Scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_database_code               4038920
_shelx_res_checksum              31609
_shelx_hkl_checksum              39017