Arbutin Derivatives Isolated from Ancient Proteaceae: Potential Phytochemical Markers Present in Bellendena, Cenarrhenes, and Persoonia Genera.
Deans, Bianca J.; Kilah, Nathan L.; Jordan, Gregory J.; Bissember, Alex C.; Smith, Jason A.; Journal of natural products 81 (2018) 1241–1251; doi:10.1021/acs.jnatprod.7b01038

data_1553344
_publ_section_title
;
 Arbutin Derivatives Isolated from Ancient Proteaceae: Potential
 Phytochemical Markers Present in Bellendena, Cenarrhenes, and Persoonia
 Genera.
;
_journal_issue                   5
_journal_name_full               'Journal of natural products'
_journal_page_first              1241
_journal_page_last               1251
_journal_paper_doi               10.1021/acs.jnatprod.7b01038
_journal_volume                  81
_journal_year                    2018
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C21 H22 O10'
_chemical_formula_sum            'C21 H22 O10'
_chemical_formula_weight         434.38
_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                   5.3530(11)
_cell_length_b                   17.855(4)
_cell_length_c                   19.903(4)
_cell_measurement_reflns_used    33901
_cell_measurement_temperature    100
_cell_measurement_theta_max      32.204
_cell_measurement_theta_min      1.532
_cell_volume                     1902.3(7)
_computing_cell_refinement       'XDS (Kabsch, 1993)'
_computing_data_collection       'BluIce (McPhillips, 2002)'
_computing_data_reduction        'XDS (Kabsch, 1993)'
_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      100.0
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.884
_diffrn_measurement_device_type  'ADSC Quantum 315r'
_diffrn_measurement_method       'Phi Scan'
_diffrn_radiation_monochromator  'Silicon Double Crystal'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0636
_diffrn_reflns_av_unetI/netI     0.0340
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.884
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            33901
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.884
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.204
_diffrn_reflns_theta_min         1.532
_diffrn_source                   'MX2 Beamline Australian Synchrotron'
_exptl_absorpt_coefficient_mu    0.122
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.517
_exptl_crystal_description       needle
_exptl_crystal_F_000             912
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.005
_exptl_crystal_size_min          0.005
_refine_diff_density_max         0.225
_refine_diff_density_min         -0.254
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details
;
 Flack x determined using 2132 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.4(3)
_refine_ls_extinction_coef       0.013(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     286
_refine_ls_number_reflns         5913
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0398
_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^)+(0.0701P)^2^+0.1132P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1089
_refine_ls_wR_factor_ref         0.1129
_reflns_Friedel_coverage         0.752
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.885
_reflns_number_gt                5362
_reflns_number_total             5913
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            np7b01038_si_003.cif
_cod_data_source_block           Compound1
_cod_database_code               1553344
_shelx_estimated_absorpt_t_max   0.999
_shelx_estimated_absorpt_t_min   0.988
_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 O(H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C5(H5A), C4(H4A), C2(H2), C3(H3A)
2.b Secondary CH2 refined with riding coordinates:
 C14(H14A,H14B), C6(H6A,H6B)
2.c Aromatic/amide H refined with riding coordinates:
 C20(H20), C21(H21), C18(H18), C17(H17), C12(H12), C8(H8), C11(H11), C9(H9)
2.d Idealised tetrahedral OH refined as rotating group:
 O4(H4), O5(H5), O3(H3), O10(H10), O7(H7)
;
_olex2_submission_special_instructions 'No special instructions were received'