Enantiomeric Pairs of Meroterpenoids with Diverse Heterocyclic Systems from Rhododendron nyingchiense.
Huang, Guang-Hui; Hu, Zhu; Lei, Chun; Wang, Pei-Pei; Yang, Jing; Li, Jing-Ya; Li, Jia; Hou, Ai-Jun; Journal of natural products 81 (2018) 1810–1818; doi:10.1021/acs.jnatprod.8b00273

data_1553374
_publ_section_title
;
 Enantiomeric Pairs of Meroterpenoids with Diverse Heterocyclic Systems
 from Rhododendron nyingchiense.
;
_journal_issue                   8
_journal_name_full               'Journal of natural products'
_journal_page_first              1810
_journal_page_last               1818
_journal_paper_doi               10.1021/acs.jnatprod.8b00273
_journal_volume                  81
_journal_year                    2018
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C17 H22 O4, H2 O'
_chemical_formula_sum            'C17 H24 O5'
_chemical_formula_weight         308.36
_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   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2016-12-05
_audit_creation_method
;
Olex2 1.2
(compiled 2016.11.30 svn.r3356 for OlexSys, GUI svn.r5269)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3465(3)
_cell_length_b                   9.3699(3)
_cell_length_c                   18.6281(6)
_cell_measurement_reflns_used    5715
_cell_measurement_temperature    296
_cell_measurement_theta_max      69.25
_cell_measurement_theta_min      4.75
_cell_volume                     1631.37(9)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      296
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.952
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0316
_diffrn_reflns_av_unetI/netI     0.0290
_diffrn_reflns_Laue_measured_fraction_full 0.967
_diffrn_reflns_Laue_measured_fraction_max 0.952
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            10793
_diffrn_reflns_point_group_measured_fraction_full 0.961
_diffrn_reflns_point_group_measured_fraction_max 0.940
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         69.906
_diffrn_reflns_theta_min         4.748
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.751
_exptl_absorpt_correction_T_max  0.7533
_exptl_absorpt_correction_T_min  0.4893
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.1078 before and 0.0463 after correction.
The Ratio of minimum to maximum transmission is 0.6495.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_description       block
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.131
_refine_diff_density_min         -0.180
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details
;
 Flack x determined using 1136 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.15(7)
_refine_ls_extinction_coef       0.0035(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2016/6 (Sheldrick 2016)'
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         2906
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0328
_refine_ls_R_factor_gt           0.0318
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0522P)^2^+0.1340P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0871
_refine_ls_wR_factor_ref         0.0881
_reflns_Friedel_coverage         0.706
_reflns_Friedel_fraction_full    0.954
_reflns_Friedel_fraction_max     0.924
_reflns_number_gt                2816
_reflns_number_total             2906
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np8b00273_si_002.cif
_cod_data_source_block           cu_dm16814_0m
_cod_database_code               1553374
_shelx_estimated_absorpt_t_max   0.929
_shelx_estimated_absorpt_t_min   0.864
_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, All O(H) groups, All O(H,H) groups
2.a Free rotating group:
 O5(H5A,H5B)
2.b Ternary CH refined with riding coordinates:
 C3(H3), C4(H4A), C11(H11)
2.c Secondary CH2 refined with riding coordinates:
 C9(H9A,H9B), C10(H10A,H10B)
2.d Aromatic/amide H refined with riding coordinates:
 C6(H6), C8(H8)
2.e Idealised Me refined as rotating group:
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C), C16(H16A,H16B,
 H16C)
2.f Idealised tetrahedral OH refined as rotating group:
 O4(H4)
;
_shelx_res_checksum              18589
_shelx_hkl_checksum              5347
_shelx_shelxl_version_number     2016/6
_olex2_submission_special_instructions 'No special instructions were received'