Cytotoxic and Anti-Inflammatory Sesquiterpenes from the Whole Plants of <i>Centipeda minima</i>.
Xue, Peng-Hui; Zhang, Nan; Liu, Da; Zhang, Qing-Ran; Duan, Jing-Shi; Yu, Ya-Qin; Li, Jin-Yan; Cao, Shi-Jie; Zhao, Feng; Kang, Ning; Qiu, Feng; Journal of natural products 84 (2021) 247–258; doi:10.1021/acs.jnatprod.0c00884

data_1560804
_publ_section_title
;
 Cytotoxic and Anti-Inflammatory Sesquiterpenes from the Whole Plants of
 <i>Centipeda minima</i>.
;
_journal_issue                   2
_journal_name_full               'Journal of natural products'
_journal_page_first              247
_journal_page_last               258
_journal_paper_doi               10.1021/acs.jnatprod.0c00884
_journal_volume                  84
_journal_year                    2021
_chemical_formula_moiety         'C20 H28 O5'
_chemical_formula_sum            'C20 H28 O5'
_chemical_formula_weight         348.42
_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_date             2020-06-06
_audit_creation_method
;
Olex2 1.3-alpha
(compiled 2020.05.22 svn.r1d9e7f8d for OlexSys, GUI svn.r6115)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.9582(2)
_cell_length_b                   23.6809(4)
_cell_length_c                   10.0261(2)
_cell_measurement_reflns_used    6784
_cell_measurement_temperature    99.99(10)
_cell_measurement_theta_max      73.5200
_cell_measurement_theta_min      4.7530
_cell_volume                     1889.49(7)
_computing_cell_refinement       'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.43f (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3-alpha (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      99.99(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.2684
_diffrn_detector_type            AtlasS2
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
--------------------------------------------------------------------------
  1  \w    -69.00  32.00   1.00    1.00    --  -40.98  57.00 -30.00  101
  2  \w   -129.00  47.00   1.00    1.00    --  -40.98   0.00 120.00  176
  3  \w     34.00 121.00   1.00    1.00    --  106.95-125.00  60.00   87
  4  \w     31.00 135.00   1.00    1.00    --  106.95 -30.00   0.00  104
  5  \w     31.00 140.00   1.00    1.00    --  106.95 -77.00  30.00  109
  6  \w     79.00 178.00   1.00    1.00    --  106.95  30.00-180.00   99
  7  \w     24.00 101.00   1.00    1.00    --  106.95 -94.00 120.00   77
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, AtlasS2'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0554732000
_diffrn_orient_matrix_UB_12      0.0415925000
_diffrn_orient_matrix_UB_13      -0.1096818000
_diffrn_orient_matrix_UB_21      0.0224497000
_diffrn_orient_matrix_UB_22      -0.0466089000
_diffrn_orient_matrix_UB_23      -0.1056599000
_diffrn_orient_matrix_UB_31      -0.1841623000
_diffrn_orient_matrix_UB_32      -0.0181794000
_diffrn_orient_matrix_UB_33      0.0199353000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0220
_diffrn_reflns_av_unetI/netI     0.0254
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.980
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            8479
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.967
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         73.636
_diffrn_reflns_theta_min         3.733
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.706
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.70759
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.43f (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.225
_exptl_crystal_description       block
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.154
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
;
 Flack x determined using 1427 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.01(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.105
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         3683
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0366
_refine_ls_R_factor_gt           0.0350
_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^)+(0.0434P)^2^+0.4904P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0874
_refine_ls_wR_factor_ref         0.0881
_reflns_Friedel_coverage         0.709
_reflns_Friedel_fraction_full    0.993
_reflns_Friedel_fraction_max     0.948
_reflns_number_gt                3568
_reflns_number_total             3683
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np0c00884_si_002.cif
_cod_data_source_block           1635c-14
_cod_database_code               1560804
_shelx_shelxl_version_number     2018/3
_reflns_odcompleteness_completeness 100.00
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     66.97
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C6(H6), C7(H7), C8(H8), C10(H10), C11(H11)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2A,H2B), C3(H3A,H3B), C9(H9A,H9B)
2.c Aromatic/amide H refined with riding coordinates:
 C3'(H3')
2.d Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C4'(H4'A,H4'B,
 H4'C), C5'(H5'A,H5'B,H5'C)
;
_shelx_res_checksum              41678
_shelx_hkl_checksum              96476
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.316
_oxdiff_exptl_absorpt_empirical_full_min 0.553