Nardoaristolones A and B, Two Terpenoids with Unusual Skeletons from Nardostachys chinensis Batal.
Liu, Ming-Li; Duan, Ying-Hui; Hou, Yun-Long; Li, Chang; Gao, Hao; Dai, Yi; Yao, Xin-Sheng; Organic letters 15 (2013) 1000–1003; doi:10.1021/ol3034466

data_1508936
_publ_section_title
;
 Nardoaristolones A and B, Two Terpenoids with Unusual Skeletons from
 Nardostachys chinensis Batal.
;
_journal_issue                   5
_journal_name_full               'Organic letters'
_journal_page_first              1000
_journal_page_last               1003
_journal_paper_doi               10.1021/ol3034466
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C32 H34 O7'
_chemical_formula_weight         530.59
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.84571(19)
_cell_length_b                   13.0433(2)
_cell_length_c                   17.6965(3)
_cell_measurement_reflns_used    15035
_cell_measurement_temperature    173.00(10)
_cell_measurement_theta_max      62.6511
_cell_measurement_theta_min      3.3855
_cell_volume                     2734.24(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173.00(10)
_diffrn_detector_area_resol_mean 16.0288
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Xcalibur, Sapphire3, Gemini ultra'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0446
_diffrn_reflns_av_sigmaI/netI    0.0230
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            24946
_diffrn_reflns_theta_full        62.75
_diffrn_reflns_theta_max         62.75
_diffrn_reflns_theta_min         4.21
_exptl_absorpt_coefficient_mu    0.735
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.70311
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.289
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1128
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.16
_refine_diff_density_max         1.066
_refine_diff_density_min         -0.158
_refine_diff_density_rms         0.044
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(3)
_refine_ls_extinction_coef       0.0058(7)
_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   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     360
_refine_ls_number_reflns         4382
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.0505
_refine_ls_R_factor_gt           0.0499
_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^)+(0.0751P)^2^+1.4751P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1373
_refine_ls_wR_factor_ref         0.1379
_reflns_number_gt                4304
_reflns_number_total             4382
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol3034466_si_002.cif
_cod_data_source_block           gh_e3_9_18_2
_cod_original_cell_volume        2734.24(7)
_cod_database_code               1508936