# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2015

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
# 
#######################################################################

data_c:\docume~1\admini~1\desktop\rohan\30julb
_audit_block_doi                 10.5517/cc134zbk
_database_code_depnum_ccdc_archive 'CCDC 1017678'
_audit_update_record             
;
2014-11-07 deposited with the CCDC.
2015-01-05 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-97
_chemical_name_systematic        30julb
_chemical_name_common            30julb
_chemical_melting_point          '204 C'
_chemical_formula_moiety         'C24 H23 O4 '
_chemical_formula_sum            'C24 H24 O4'
_chemical_formula_weight         376.43
_chemical_absolute_configuration rm

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           Orthorhombic
_symmetry_space_group_name_H-M   P2(1)2(1)2(1)

loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'x+1/2, -y+1/2, -z'
'-x, y+1/2, -z+1/2'

_cell_length_a                   8.814(2)
_cell_length_b                   9.199(3)
_cell_length_c                   24.640(7)
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_volume                     1997.8(10)
_cell_formula_units_Z            4
_cell_measurement_temperature    173(2)
_cell_measurement_reflns_used    4508
_cell_measurement_theta_min      2.36
_cell_measurement_theta_max      23.52

_exptl_crystal_description       block
_exptl_crystal_colour            yellow
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.23
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             800
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_correction_T_min  0.9776
_exptl_absorpt_correction_T_max  0.9809
_exptl_absorpt_process_details   sadabs

_exptl_special_details           
; 
 ? 
;

_diffrn_ambient_temperature      173(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'φ and ω scans'
_diffrn_detector_area_resol_mean ?
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        ?
_diffrn_reflns_number            14292
_diffrn_reflns_av_R_equivalents  0.0679
_diffrn_reflns_av_sigmaI/netI    0.0705
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_theta_min         2.45
_diffrn_reflns_theta_max         25.49
_reflns_number_total             3712
_reflns_number_gt                2450
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       'Bruker APEX2'
_computing_cell_refinement       'Bruker SAINT'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'

_refine_special_details          
; 
 Refinement of F² against ALL reflections.  The weighted R-factor wR and 
 goodness of fit S are based on F², conventional R-factors R are based 
 on F, with F set to zero for negative F². The threshold expression of 
 F² > 2sigma(F²) is used only for calculating R-factors(gt) etc. and is 
 not relevant to the choice of reflections for refinement.  R-factors based 
 on F² are statistically about twice as large as those based on F, and R- 
 factors based on ALL data will be even larger. 
;

_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'calc w=1/[σ²(Fo²)+(0.0483P)²+0.1165P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    mixed
_refine_ls_extinction_method     none
_refine_ls_extinction_coef       ?
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.4(15)
_refine_ls_number_reflns         3712
_refine_ls_number_parameters     257
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1000
_refine_ls_R_factor_gt           0.0526
_refine_ls_wR_factor_ref         0.1227
_refine_ls_wR_factor_gt          0.1089
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_restrained_S_all      1.083
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
O1 O 0.4933(2) 0.0689(2) 0.87915(7) 0.0557(6) Uani 1 1 d . . .
O2 O -0.1307(2) 0.3202(2) 0.89722(7) 0.0518(5) Uani 1 1 d . . .
O3 O -0.5176(2) 0.3036(3) 0.71058(8) 0.0597(6) Uani 1 1 d . . .
O4 O 0.1944(2) 0.3364(3) 0.74302(7) 0.0588(7) Uani 1 1 d . . .
H4 H 0.2877 0.3307 0.7363 0.071 Uiso 1 1 calc R . .
C1 C -0.2807(3) 0.2336(4) 0.64234(12) 0.0665(10) Uani 1 1 d . . .
H9 H -0.3640 0.2752 0.6210 0.100 Uiso 1 1 calc R . .
H8 H -0.3071 0.1344 0.6533 0.100 Uiso 1 1 calc R . .
H1 H -0.1882 0.2317 0.6203 0.100 Uiso 1 1 calc R . .
C2 C -0.2543(3) 0.3255(3) 0.69230(10) 0.0477(7) Uani 1 1 d . . .
H10 H -0.2199 0.4229 0.6792 0.057 Uiso 1 1 calc R . .
C3 C -0.1296(3) 0.2681(3) 0.72919(11) 0.0488(8) Uani 1 1 d . . .
H6 H -0.0333 0.2643 0.7086 0.059 Uiso 1 1 calc R . .
H7 H -0.1552 0.1677 0.7404 0.059 Uiso 1 1 calc R . .
C4 C -0.1067(3) 0.3610(3) 0.77974(10) 0.0431(7) Uani 1 1 d . . .
H5 H -0.0850 0.4629 0.7679 0.052 Uiso 1 1 calc R . .
C5 C 0.0220(3) 0.3109(3) 0.81545(10) 0.0412(7) Uani 1 1 d . . .
C6 C 0.0005(3) 0.2838(3) 0.87049(10) 0.0439(7) Uani 1 1 d . . .
C7 C 0.1117(3) 0.2182(3) 0.90248(11) 0.0487(7) Uani 1 1 d . . .
H20 H 0.0918 0.1946 0.9393 0.058 Uiso 1 1 calc R . .
C8 C 0.2519(3) 0.1881(3) 0.87947(10) 0.0436(7) Uani 1 1 d . . .
C9 C 0.3726(3) 0.1184(3) 0.91101(11) 0.0480(8) Uani 1 1 d . . .
C10 C 0.5985(4) 0.0148(3) 0.91509(12) 0.0520(8) Uani 1 1 d . . .
C11 C 0.7385(4) -0.0375(4) 0.90091(14) 0.0658(9) Uani 1 1 d . . .
H3 H 0.7712 -0.0421 0.8642 0.079 Uiso 1 1 calc R . .
C12 C 0.8295(4) -0.0836(4) 0.94364(16) 0.0746(11) Uani 1 1 d . . .
H2 H 0.9279 -0.1208 0.9363 0.089 Uiso 1 1 calc R . .
C13 C 0.7790(5) -0.0760(5) 0.99691(16) 0.0847(12) Uani 1 1 d . . .
H23 H 0.8429 -0.1107 1.0251 0.102 Uiso 1 1 calc R . .
C14 C 0.6400(5) -0.0200(4) 1.00994(15) 0.0832(12) Uani 1 1 d . . .
H22 H 0.6082 -0.0123 1.0467 0.100 Uiso 1 1 calc R . .
C15 C 0.5458(4) 0.0257(4) 0.96733(12) 0.0598(9) Uani 1 1 d . . .
C16 C 0.4006(4) 0.0944(4) 0.96319(12) 0.0642(9) Uani 1 1 d . . .
H21 H 0.3356 0.1186 0.9926 0.077 Uiso 1 1 calc R . .
C17 C -0.2319(3) 0.4221(3) 0.86911(11) 0.0474(7) Uani 1 1 d . . .
C18 C -0.2550(3) 0.3614(3) 0.81219(10) 0.0417(7) Uani 1 1 d . . .
H13 H -0.2857 0.2574 0.8166 0.050 Uiso 1 1 calc R . .
C19 C -0.3784(3) 0.4340(3) 0.77720(11) 0.0483(7) Uani 1 1 d . . .
H11 H -0.4758 0.4351 0.7972 0.058 Uiso 1 1 calc R . .
H12 H -0.3493 0.5358 0.7692 0.058 Uiso 1 1 calc R . .
C20 C -0.3962(3) 0.3513(3) 0.72529(11) 0.0448(7) Uani 1 1 d . . .
C21 C 0.1675(3) 0.2908(3) 0.79494(10) 0.0432(7) Uani 1 1 d . . .
C22 C 0.2799(3) 0.2283(3) 0.82611(10) 0.0470(7) Uani 1 1 d . . .
H24 H 0.3775 0.2126 0.8109 0.056 Uiso 1 1 calc R . .
C23 C -0.3749(3) 0.4201(4) 0.90327(12) 0.0628(9) Uani 1 1 d . . .
H16 H -0.3507 0.4509 0.9404 0.094 Uiso 1 1 calc R . .
H15 H -0.4167 0.3214 0.9040 0.094 Uiso 1 1 calc R . .
H14 H -0.4498 0.4867 0.8876 0.094 Uiso 1 1 calc R . .
C24 C -0.1612(4) 0.5726(3) 0.87021(13) 0.0636(9) Uani 1 1 d . . .
H19 H -0.0621 0.5698 0.8522 0.095 Uiso 1 1 calc R . .
H17 H -0.1482 0.6040 0.9079 0.095 Uiso 1 1 calc R . .
H18 H -0.2277 0.6412 0.8512 0.095 Uiso 1 1 calc R . .


_geom_special_details            
; 
 All esds (except the esd in the dihedral angle between two l.s. planes) 
 are estimated using the full covariance matrix.  The cell esds are taken 
 into account individually in the estimation of esds in distances, angles 
 and torsion angles; correlations between esds in cell parameters are only 
 used when they are defined by crystal symmetry.  An approximate (isotropic) 
 treatment of cell esds is used for estimating esds involving l.s. planes. 
;

loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
O1 C10 1.375(3) . ?
O1 C9 1.398(3) . ?
O2 C6 1.372(3) . ?
O2 C17 1.467(3) . ?
O3 C20 1.212(3) . ?
O4 C21 1.367(3) . ?
O4 H4 0.8400 . ?
C1 C2 1.511(4) . ?
C1 H9 0.9800 . ?
C1 H8 0.9800 . ?
C1 H1 0.9800 . ?
C2 C20 1.510(4) . ?
C2 C3 1.521(4) . ?
C2 H10 1.0000 . ?
C3 C4 1.524(4) . ?
C3 H6 0.9900 . ?
C3 H7 0.9900 . ?
C4 C5 1.508(4) . ?
C4 C18 1.532(3) . ?
C4 H5 1.0000 . ?
C5 C21 1.391(3) . ?
C5 C6 1.392(4) . ?
C6 C7 1.395(4) . ?
C7 C8 1.388(4) . ?
C7 H20 0.9500 . ?
C8 C22 1.388(3) . ?
C8 C9 1.465(4) . ?
C9 C16 1.328(4) . ?
C10 C11 1.370(4) . ?
C10 C15 1.372(4) . ?
C11 C12 1.390(4) . ?
C11 H3 0.9500 . ?
C12 C13 1.388(5) . ?
C12 H2 0.9500 . ?
C13 C14 1.368(5) . ?
C13 H23 0.9500 . ?
C14 C15 1.403(4) . ?
C14 H22 0.9500 . ?
C15 C16 1.431(4) . ?
C16 H21 0.9500 . ?
C17 C23 1.516(4) . ?
C17 C24 1.519(4) . ?
C17 C18 1.523(4) . ?
C18 C19 1.540(4) . ?
C18 H13 1.0000 . ?
C19 C20 1.497(4) . ?
C19 H11 0.9900 . ?
C19 H12 0.9900 . ?
C21 C22 1.379(4) . ?
C22 H24 0.9500 . ?
C23 H16 0.9800 . ?
C23 H15 0.9800 . ?
C23 H14 0.9800 . ?
C24 H19 0.9800 . ?
C24 H17 0.9800 . ?
C24 H18 0.9800 . ?

loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle_publ_flag
C10 O1 C9 105.6(2) . . ?
C6 O2 C17 116.2(2) . . ?
C21 O4 H4 109.5 . . ?
C2 C1 H9 109.5 . . ?
C2 C1 H8 109.5 . . ?
H9 C1 H8 109.5 . . ?
C2 C1 H1 109.5 . . ?
H9 C1 H1 109.5 . . ?
H8 C1 H1 109.5 . . ?
C20 C2 C1 113.5(2) . . ?
C20 C2 C3 109.3(2) . . ?
C1 C2 C3 113.8(3) . . ?
C20 C2 H10 106.5 . . ?
C1 C2 H10 106.5 . . ?
C3 C2 H10 106.5 . . ?
C2 C3 C4 112.9(2) . . ?
C2 C3 H6 109.0 . . ?
C4 C3 H6 109.0 . . ?
C2 C3 H7 109.0 . . ?
C4 C3 H7 109.0 . . ?
H6 C3 H7 107.8 . . ?
C5 C4 C3 113.9(2) . . ?
C5 C4 C18 109.8(2) . . ?
C3 C4 C18 108.3(2) . . ?
C5 C4 H5 108.2 . . ?
C3 C4 H5 108.2 . . ?
C18 C4 H5 108.2 . . ?
C21 C5 C6 117.1(2) . . ?
C21 C5 C4 121.5(2) . . ?
C6 C5 C4 121.4(2) . . ?
O2 C6 C5 122.6(2) . . ?
O2 C6 C7 115.2(2) . . ?
C5 C6 C7 122.2(2) . . ?
C8 C7 C6 118.8(2) . . ?
C8 C7 H20 120.6 . . ?
C6 C7 H20 120.6 . . ?
C7 C8 C22 119.5(3) . . ?
C7 C8 C9 121.1(2) . . ?
C22 C8 C9 119.4(3) . . ?
C16 C9 O1 110.4(2) . . ?
C16 C9 C8 136.2(3) . . ?
O1 C9 C8 113.4(2) . . ?
C11 C10 C15 124.7(3) . . ?
C11 C10 O1 124.8(3) . . ?
C15 C10 O1 110.5(3) . . ?
C10 C11 C12 115.7(3) . . ?
C10 C11 H3 122.1 . . ?
C12 C11 H3 122.1 . . ?
C13 C12 C11 121.1(3) . . ?
C13 C12 H2 119.5 . . ?
C11 C12 H2 119.5 . . ?
C14 C13 C12 121.9(3) . . ?
C14 C13 H23 119.1 . . ?
C12 C13 H23 119.1 . . ?
C13 C14 C15 117.9(3) . . ?
C13 C14 H22 121.1 . . ?
C15 C14 H22 121.1 . . ?
C10 C15 C14 118.7(3) . . ?
C10 C15 C16 105.5(3) . . ?
C14 C15 C16 135.6(3) . . ?
C9 C16 C15 108.0(3) . . ?
C9 C16 H21 126.0 . . ?
C15 C16 H21 126.0 . . ?
O2 C17 C23 103.6(2) . . ?
O2 C17 C24 108.9(2) . . ?
C23 C17 C24 110.0(3) . . ?
O2 C17 C18 106.4(2) . . ?
C23 C17 C18 113.3(2) . . ?
C24 C17 C18 113.9(2) . . ?
C17 C18 C4 111.5(2) . . ?
C17 C18 C19 116.8(2) . . ?
C4 C18 C19 108.1(2) . . ?
C17 C18 H13 106.6 . . ?
C4 C18 H13 106.6 . . ?
C19 C18 H13 106.6 . . ?
C20 C19 C18 109.4(2) . . ?
C20 C19 H11 109.8 . . ?
C18 C19 H11 109.8 . . ?
C20 C19 H12 109.8 . . ?
C18 C19 H12 109.8 . . ?
H11 C19 H12 108.2 . . ?
O3 C20 C19 122.2(2) . . ?
O3 C20 C2 120.9(3) . . ?
C19 C20 C2 116.9(2) . . ?
O4 C21 C22 121.6(2) . . ?
O4 C21 C5 117.3(2) . . ?
C22 C21 C5 121.0(2) . . ?
C21 C22 C8 120.7(3) . . ?
C21 C22 H24 119.6 . . ?
C8 C22 H24 119.6 . . ?
C17 C23 H16 109.5 . . ?
C17 C23 H15 109.5 . . ?
H16 C23 H15 109.5 . . ?
C17 C23 H14 109.5 . . ?
H16 C23 H14 109.5 . . ?
H15 C23 H14 109.5 . . ?
C17 C24 H19 109.5 . . ?
C17 C24 H17 109.5 . . ?
H19 C24 H17 109.5 . . ?
C17 C24 H18 109.5 . . ?
H19 C24 H18 109.5 . . ?
H17 C24 H18 109.5 . . ?

loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
C20 C2 C3 C4 -50.9(3) . . . . ?
C1 C2 C3 C4 -179.1(3) . . . . ?
C2 C3 C4 C5 -176.9(2) . . . . ?
C2 C3 C4 C18 60.7(3) . . . . ?
C3 C4 C5 C21 53.7(4) . . . . ?
C18 C4 C5 C21 175.4(3) . . . . ?
C3 C4 C5 C6 -126.7(3) . . . . ?
C18 C4 C5 C6 -5.1(4) . . . . ?
C17 O2 C6 C5 -15.3(4) . . . . ?
C17 O2 C6 C7 164.4(2) . . . . ?
C21 C5 C6 O2 169.9(3) . . . . ?
C4 C5 C6 O2 -9.6(4) . . . . ?
C21 C5 C6 C7 -9.7(4) . . . . ?
C4 C5 C6 C7 170.8(3) . . . . ?
O2 C6 C7 C8 -175.2(3) . . . . ?
C5 C6 C7 C8 4.5(4) . . . . ?
C6 C7 C8 C22 2.2(4) . . . . ?
C6 C7 C8 C9 -179.5(2) . . . . ?
C10 O1 C9 C16 -0.8(3) . . . . ?
C10 O1 C9 C8 176.7(2) . . . . ?
C7 C8 C9 C16 -15.9(5) . . . . ?
C22 C8 C9 C16 162.3(4) . . . . ?
C7 C8 C9 O1 167.4(3) . . . . ?
C22 C8 C9 O1 -14.4(4) . . . . ?
C9 O1 C10 C11 -176.2(3) . . . . ?
C9 O1 C10 C15 1.5(3) . . . . ?
C15 C10 C11 C12 0.9(5) . . . . ?
O1 C10 C11 C12 178.2(3) . . . . ?
C10 C11 C12 C13 0.1(5) . . . . ?
C11 C12 C13 C14 -1.7(6) . . . . ?
C12 C13 C14 C15 2.2(6) . . . . ?
C11 C10 C15 C14 -0.3(5) . . . . ?
O1 C10 C15 C14 -178.0(3) . . . . ?
C11 C10 C15 C16 176.1(3) . . . . ?
O1 C10 C15 C16 -1.5(4) . . . . ?
C13 C14 C15 C10 -1.2(6) . . . . ?
C13 C14 C15 C16 -176.4(4) . . . . ?
O1 C9 C16 C15 -0.1(4) . . . . ?
C8 C9 C16 C15 -176.8(3) . . . . ?
C10 C15 C16 C9 1.0(4) . . . . ?
C14 C15 C16 C9 176.6(4) . . . . ?
C6 O2 C17 C23 170.6(2) . . . . ?
C6 O2 C17 C24 -72.3(3) . . . . ?
C6 O2 C17 C18 50.9(3) . . . . ?
O2 C17 C18 C4 -65.0(3) . . . . ?
C23 C17 C18 C4 -178.2(2) . . . . ?
C24 C17 C18 C4 55.0(3) . . . . ?
O2 C17 C18 C19 170.0(2) . . . . ?
C23 C17 C18 C19 56.7(3) . . . . ?
C24 C17 C18 C19 -70.0(3) . . . . ?
C5 C4 C18 C17 42.0(3) . . . . ?
C3 C4 C18 C17 167.0(2) . . . . ?
C5 C4 C18 C19 171.8(2) . . . . ?
C3 C4 C18 C19 -63.3(3) . . . . ?
C17 C18 C19 C20 -174.2(2) . . . . ?
C4 C18 C19 C20 59.1(3) . . . . ?
C18 C19 C20 O3 124.9(3) . . . . ?
C18 C19 C20 C2 -53.4(3) . . . . ?
C1 C2 C20 O3 -1.8(4) . . . . ?
C3 C2 C20 O3 -130.1(3) . . . . ?
C1 C2 C20 C19 176.5(3) . . . . ?
C3 C2 C20 C19 48.2(4) . . . . ?
C6 C5 C21 O4 -171.1(3) . . . . ?
C4 C5 C21 O4 8.5(4) . . . . ?
C6 C5 C21 C22 8.4(4) . . . . ?
C4 C5 C21 C22 -172.0(3) . . . . ?
O4 C21 C22 C8 177.4(3) . . . . ?
C5 C21 C22 C8 -2.1(5) . . . . ?
C7 C8 C22 C21 -3.4(4) . . . . ?
C9 C8 C22 C21 178.3(3) . . . . ?

_diffrn_measured_fraction_theta_max 0.999
_diffrn_reflns_theta_full        25.49
_diffrn_measured_fraction_theta_full 0.999
_refine_diff_density_max         0.189
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.044
_exptl_crystal_recrystallization_method 
'Re-crystallisation from solvent: MeOH/CDCl3'
_chemical_compound_source        --
