# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2014

#######################################################################
#
#                 Cambridge Crystallographic Data Centre
#                                CCDC 
# 
#######################################################################
# 
#  This CIF contains data from an original supplementary publication
#  deposited with the CCDC, and may include chemical, crystal,
#  experimental, refinement, atomic coordinates,
#  anisotropic displacement parameters and molecular geometry data,
#  as required by the journal to which it was submitted.
#
#  This CIF is provided on the understanding that it is used for bona
#  fide research purposes only. It may contain copyright material
#  of the CCDC or of third parties, and may not be copied or further
#  disseminated in any form, whether machine-readable or not,
#  except for the purpose of generating routine backup copies
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# 
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#  data retrieval see:
#                         www.ccdc.cam.ac.uk
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#  Bona fide researchers may freely download Mercury and enCIFer
#  from this site to visualise CIF-encoded structures and 
#  to carry out CIF format checking respectively.
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data_140515_ls140512
_audit_creation_date             2014-05-15
_audit_creation_method           
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_chemical_name_common            ?
_chemical_name_systematic        
;
 ? 
;
_chemical_formula_moiety         'C21 H18 N2 O5'
_chemical_formula_sum            'C21 H18 N2 O5'
_chemical_formula_weight         378.37
_chemical_melting_point          ?
_chemical_oxdiff_formula         'c10 h10 n2 o8'
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'
N N 0.0061 0.0033 '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'

_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_H-M_alt        'C 1 2/c 1'
_space_group_name_Hall           '-C 2yc'
loop_
_space_group_symop_id
_space_group_symop_operation_xyz
1 'x, y, z'
2 '-x, y, -z+1/2'
3 'x+1/2, y+1/2, z'
4 '-x+1/2, y+1/2, -z+1/2'
5 '-x, -y, -z'
6 'x, -y, z-1/2'
7 '-x+1/2, -y+1/2, -z'
8 'x+1/2, -y+1/2, z-1/2'

_cell_length_a                   34.026(3)
_cell_length_b                   8.1856(7)
_cell_length_c                   13.2003(9)
_cell_angle_alpha                90.00
_cell_angle_beta                 94.279(7)
_cell_angle_gamma                90.00
_cell_volume                     3666.4(5)
_cell_formula_units_Z            8
_cell_measurement_reflns_used    2217
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.5224
_cell_measurement_theta_min      2.7522
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.68741
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.371
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             1584
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.23
_exptl_special_details           
;
 ? 
;
_diffrn_reflns_av_R_equivalents  0.0345
_diffrn_reflns_av_unetI/netI     0.0435
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7332
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.24
_diffrn_ambient_temperature      293.15
_diffrn_detector_area_resol_mean 10.3592
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini ultra'
_diffrn_measurement_method       'ω scans'
_diffrn_orient_matrix_UB_11      -0.0113876000
_diffrn_orient_matrix_UB_12      -0.0528737000
_diffrn_orient_matrix_UB_13      -0.0330786000
_diffrn_orient_matrix_UB_21      0.0093301000
_diffrn_orient_matrix_UB_22      -0.0686780000
_diffrn_orient_matrix_UB_23      0.0241890000
_diffrn_orient_matrix_UB_31      -0.0148252000
_diffrn_orient_matrix_UB_32      -0.0025158000
_diffrn_orient_matrix_UB_33      0.0349803000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_source                   'Enhance (Mo) X-ray Source'
_diffrn_standards_decay_%        ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_number         ?
_reflns_number_gt                2398
_reflns_number_total             3342
_reflns_odcompleteness_completeness 99.58
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_reflns_threshold_expression     >2sigma(I)
_computing_cell_refinement       
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection       
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction        
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.268
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.0028(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     262
_refine_ls_number_reflns         3342
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0709
_refine_ls_R_factor_gt           0.0482
_refine_ls_restrained_S_all      1.029
_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/[σ²(Fo²)+(0.0619P)²+1.4145P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1178
_refine_ls_wR_factor_ref         0.1354
_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. 
;
_olex2_refinement_description    
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C4(H4), C5(H5), C8(H8), C9(H9), C16(H16), C17(H17), C19(H19),
 C20(H20)
2.b Idealised Me refined as rotating group:
 C14(H14A,H14B,H14C), C21(H21A,H21B,H21C)
;
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
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_calc_flag
_atom_site_disorder_assembly
_atom_site_disorder_group
_atom_site_refinement_flags_posn
O1 O 0.47652(5) -0.1607(2) 0.63725(13) 0.0766(5) Uani 1 d . . .
O2 O 0.42900(5) 0.0103(2) 0.62926(15) 0.0875(6) Uani 1 d . . .
O3 O 0.66492(10) 0.9755(3) 0.6447(2) 0.1595(14) Uani 1 d . . .
O4 O 0.66225(6) 0.9356(2) 0.48255(15) 0.0866(6) Uani 1 d . . .
O5 O 0.71942(5) 0.5066(2) 0.17873(11) 0.0670(5) Uani 1 d . . .
N1 N 0.46395(6) -0.0214(3) 0.63095(12) 0.0564(5) Uani 1 d . . .
N2 N 0.59678(6) 0.3767(2) 0.44383(14) 0.0640(6) Uani 1 d . . .
H2A H 0.5778(8) 0.307(3) 0.4406(18) 0.077 Uiso 1 d . . R
H2B H 0.6104(8) 0.383(3) 0.392(2) 0.077 Uiso 1 d . . R
C1 C 0.55784(6) 0.1997(3) 0.61216(14) 0.0466(5) Uani 1 d . . .
H1 H 0.5845 0.1757 0.6097 0.056 Uiso 1 calc . . R
C2 C 0.53147(6) 0.0743(3) 0.62050(13) 0.0471(5) Uani 1 d . . .
H2 H 0.5400 -0.0337 0.6242 0.056 Uiso 1 calc . . R
C3 C 0.49213(6) 0.1126(3) 0.62323(13) 0.0447(5) Uani 1 d . . .
C4 C 0.47873(6) 0.2702(3) 0.62028(14) 0.0499(5) Uani 1 d . . .
H4 H 0.4521 0.2927 0.6233 0.060 Uiso 1 calc . . R
C5 C 0.50556(6) 0.3948(3) 0.61275(14) 0.0481(5) Uani 1 d . . .
H5 H 0.4968 0.5025 0.6112 0.058 Uiso 1 calc . . R
C6 C 0.54553(6) 0.3622(2) 0.60736(13) 0.0422(5) Uani 1 d . . .
C7 C 0.57409(6) 0.4967(2) 0.59654(13) 0.0421(5) Uani 1 d . . .
C8 C 0.57688(6) 0.6235(3) 0.66625(15) 0.0501(5) Uani 1 d . . .
H8 H 0.5603 0.6243 0.7191 0.060 Uiso 1 calc . . R
C9 C 0.60347(6) 0.7476(3) 0.65914(15) 0.0537(6) Uani 1 d . . .
H9 H 0.6052 0.8299 0.7079 0.064 Uiso 1 calc . . R
C10 C 0.62807(6) 0.7513(2) 0.57898(15) 0.0470(5) Uani 1 d . . .
C11 C 0.62636(5) 0.6263(2) 0.50702(13) 0.0415(5) Uani 1 d . . .
C12 C 0.59892(5) 0.4988(2) 0.51561(13) 0.0408(5) Uani 1 d . . .
C13 C 0.65395(7) 0.8960(3) 0.5739(2) 0.0645(6) Uani 1 d . . .
C14 C 0.68307(10) 1.0846(3) 0.4674(3) 0.1058(11) Uani 1 d . . .
H14A H 0.6858 1.1000 0.3962 0.159 Uiso 1 calc . . GR
H14B H 0.7087 1.0790 0.5028 0.159 Uiso 1 calc . . GR
H14C H 0.6687 1.1745 0.4931 0.159 Uiso 1 calc . . GR
C15 C 0.65319(5) 0.6104(2) 0.42257(13) 0.0401(5) Uani 1 d . . .
C16 C 0.64377(6) 0.6733(3) 0.32606(15) 0.0499(5) Uani 1 d . . .
H16 H 0.6219 0.7408 0.3149 0.060 Uiso 1 calc . . R
C17 C 0.66641(6) 0.6371(3) 0.24655(15) 0.0515(5) Uani 1 d . . .
H17 H 0.6597 0.6799 0.1823 0.062 Uiso 1 calc . . R
C18 C 0.69903(6) 0.5373(2) 0.26217(14) 0.0463(5) Uani 1 d . . .
C19 C 0.70915(6) 0.4761(3) 0.35738(15) 0.0531(5) Uani 1 d . . .
H19 H 0.7312 0.4098 0.3686 0.064 Uiso 1 calc . . R
C20 C 0.68625(6) 0.5138(2) 0.43662(14) 0.0488(5) Uani 1 d . . .
H20 H 0.6934 0.4727 0.5010 0.059 Uiso 1 calc . . R
C21 C 0.74647(9) 0.3738(4) 0.1856(2) 0.0860(9) Uani 1 d . . .
H21A H 0.7544 0.3481 0.1191 0.129 Uiso 1 calc . . GR
H21B H 0.7341 0.2802 0.2132 0.129 Uiso 1 calc . . GR
H21C H 0.7692 0.4036 0.2290 0.129 Uiso 1 calc . . GR


_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 N1 1.219(2) . ?
O2 N1 1.216(2) . ?
O3 C13 1.177(3) . ?
O4 C13 1.300(3) . ?
O4 C14 1.431(3) . ?
O5 C18 1.368(2) . ?
O5 C21 1.423(3) . ?
N1 C3 1.465(3) . ?
N2 H2A 0.86(3) . ?
N2 H2B 0.86(3) . ?
N2 C12 1.375(3) . ?
C1 H1 0.9300 . ?
C1 C2 1.373(3) . ?
C1 C6 1.395(3) . ?
C2 H2 0.9300 . ?
C2 C3 1.378(3) . ?
C3 C4 1.368(3) . ?
C4 H4 0.9300 . ?
C4 C5 1.378(3) . ?
C5 H5 0.9300 . ?
C5 C6 1.393(3) . ?
C6 C7 1.482(3) . ?
C7 C8 1.386(3) . ?
C7 C12 1.411(3) . ?
C8 H8 0.9300 . ?
C8 C9 1.368(3) . ?
C9 H9 0.9300 . ?
C9 C10 1.398(3) . ?
C10 C11 1.395(3) . ?
C10 C13 1.480(3) . ?
C11 C12 1.411(3) . ?
C11 C15 1.498(2) . ?
C14 H14A 0.9600 . ?
C14 H14B 0.9600 . ?
C14 H14C 0.9600 . ?
C15 C16 1.389(3) . ?
C15 C20 1.376(3) . ?
C16 H16 0.9300 . ?
C16 C17 1.380(3) . ?
C17 H17 0.9300 . ?
C17 C18 1.381(3) . ?
C18 C19 1.373(3) . ?
C19 H19 0.9300 . ?
C19 C20 1.385(3) . ?
C20 H20 0.9300 . ?
C21 H21A 0.9600 . ?
C21 H21B 0.9600 . ?
C21 H21C 0.9600 . ?

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
C13 O4 C14 119.1(2) . . ?
C18 O5 C21 116.99(17) . . ?
O1 N1 C3 118.49(19) . . ?
O2 N1 O1 122.6(2) . . ?
O2 N1 C3 118.9(2) . . ?
H2A N2 H2B 117(2) . . ?
C12 N2 H2A 121.2(16) . . ?
C12 N2 H2B 120.2(17) . . ?
C2 C1 H1 119.3 . . ?
C2 C1 C6 121.40(18) . . ?
C6 C1 H1 119.3 . . ?
C1 C2 H2 120.9 . . ?
C1 C2 C3 118.29(19) . . ?
C3 C2 H2 120.9 . . ?
C2 C3 N1 118.28(19) . . ?
C4 C3 N1 119.29(19) . . ?
C4 C3 C2 122.43(19) . . ?
C3 C4 H4 120.7 . . ?
C3 C4 C5 118.62(19) . . ?
C5 C4 H4 120.7 . . ?
C4 C5 H5 119.4 . . ?
C4 C5 C6 121.13(19) . . ?
C6 C5 H5 119.4 . . ?
C1 C6 C7 121.06(17) . . ?
C5 C6 C1 118.11(18) . . ?
C5 C6 C7 120.83(18) . . ?
C8 C7 C6 120.35(16) . . ?
C8 C7 C12 118.59(17) . . ?
C12 C7 C6 121.06(16) . . ?
C7 C8 H8 119.2 . . ?
C9 C8 C7 121.57(17) . . ?
C9 C8 H8 119.2 . . ?
C8 C9 H9 119.9 . . ?
C8 C9 C10 120.27(18) . . ?
C10 C9 H9 119.9 . . ?
C9 C10 C13 116.30(18) . . ?
C11 C10 C9 120.22(18) . . ?
C11 C10 C13 123.44(18) . . ?
C10 C11 C12 118.83(16) . . ?
C10 C11 C15 125.00(17) . . ?
C12 C11 C15 116.08(15) . . ?
N2 C12 C7 120.61(17) . . ?
N2 C12 C11 118.91(16) . . ?
C11 C12 C7 120.48(16) . . ?
O3 C13 O4 121.4(2) . . ?
O3 C13 C10 124.2(3) . . ?
O4 C13 C10 114.4(2) . . ?
O4 C14 H14A 109.5 . . ?
O4 C14 H14B 109.5 . . ?
O4 C14 H14C 109.5 . . ?
H14A C14 H14B 109.5 . . ?
H14A C14 H14C 109.5 . . ?
H14B C14 H14C 109.5 . . ?
C16 C15 C11 122.59(17) . . ?
C20 C15 C11 119.12(16) . . ?
C20 C15 C16 117.83(16) . . ?
C15 C16 H16 119.5 . . ?
C17 C16 C15 120.95(19) . . ?
C17 C16 H16 119.5 . . ?
C16 C17 H17 119.9 . . ?
C16 C17 C18 120.11(18) . . ?
C18 C17 H17 119.9 . . ?
O5 C18 C17 116.01(17) . . ?
O5 C18 C19 124.23(19) . . ?
C19 C18 C17 119.76(17) . . ?
C18 C19 H19 120.2 . . ?
C18 C19 C20 119.57(19) . . ?
C20 C19 H19 120.2 . . ?
C15 C20 C19 121.77(18) . . ?
C15 C20 H20 119.1 . . ?
C19 C20 H20 119.1 . . ?
O5 C21 H21A 109.5 . . ?
O5 C21 H21B 109.5 . . ?
O5 C21 H21C 109.5 . . ?
H21A C21 H21B 109.5 . . ?
H21A C21 H21C 109.5 . . ?
H21B C21 H21C 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
O1 N1 C3 C2 1.8(3) . . . . ?
O1 N1 C3 C4 -177.35(17) . . . . ?
O2 N1 C3 C2 -177.04(18) . . . . ?
O2 N1 C3 C4 3.8(3) . . . . ?
O5 C18 C19 C20 -179.46(19) . . . . ?
N1 C3 C4 C5 -179.83(16) . . . . ?
C1 C2 C3 N1 179.31(15) . . . . ?
C1 C2 C3 C4 -1.5(3) . . . . ?
C1 C6 C7 C8 -124.5(2) . . . . ?
C1 C6 C7 C12 55.6(2) . . . . ?
C2 C1 C6 C5 0.9(3) . . . . ?
C2 C1 C6 C7 -178.92(17) . . . . ?
C2 C3 C4 C5 1.0(3) . . . . ?
C3 C4 C5 C6 0.5(3) . . . . ?
C4 C5 C6 C1 -1.4(3) . . . . ?
C4 C5 C6 C7 178.38(17) . . . . ?
C5 C6 C7 C8 55.7(3) . . . . ?
C5 C6 C7 C12 -124.3(2) . . . . ?
C6 C1 C2 C3 0.5(3) . . . . ?
C6 C7 C8 C9 178.80(19) . . . . ?
C6 C7 C12 N2 0.9(3) . . . . ?
C6 C7 C12 C11 -179.09(17) . . . . ?
C7 C8 C9 C10 1.6(3) . . . . ?
C8 C7 C12 N2 -179.1(2) . . . . ?
C8 C7 C12 C11 0.9(3) . . . . ?
C8 C9 C10 C11 -1.6(3) . . . . ?
C8 C9 C10 C13 176.0(2) . . . . ?
C9 C10 C11 C12 1.3(3) . . . . ?
C9 C10 C11 C15 -175.22(19) . . . . ?
C9 C10 C13 O3 26.2(4) . . . . ?
C9 C10 C13 O4 -150.2(2) . . . . ?
C10 C11 C12 N2 179.0(2) . . . . ?
C10 C11 C12 C7 -1.0(3) . . . . ?
C10 C11 C15 C16 -93.2(3) . . . . ?
C10 C11 C15 C20 94.7(2) . . . . ?
C11 C10 C13 O3 -156.3(3) . . . . ?
C11 C10 C13 O4 27.3(3) . . . . ?
C11 C15 C16 C17 -170.84(19) . . . . ?
C11 C15 C20 C19 170.92(18) . . . . ?
C12 C7 C8 C9 -1.2(3) . . . . ?
C12 C11 C15 C16 90.2(2) . . . . ?
C12 C11 C15 C20 -81.9(2) . . . . ?
C13 C10 C11 C12 -176.2(2) . . . . ?
C13 C10 C11 C15 7.3(3) . . . . ?
C14 O4 C13 O3 -3.9(4) . . . . ?
C14 O4 C13 C10 172.6(2) . . . . ?
C15 C11 C12 N2 -4.2(3) . . . . ?
C15 C11 C12 C7 175.84(17) . . . . ?
C15 C16 C17 C18 -0.1(3) . . . . ?
C16 C15 C20 C19 -1.5(3) . . . . ?
C16 C17 C18 O5 179.26(19) . . . . ?
C16 C17 C18 C19 -0.9(3) . . . . ?
C17 C18 C19 C20 0.7(3) . . . . ?
C18 C19 C20 C15 0.5(3) . . . . ?
C20 C15 C16 C17 1.3(3) . . . . ?
C21 O5 C18 C17 -164.4(2) . . . . ?
C21 O5 C18 C19 15.8(3) . . . . ?

_database_code_depnum_ccdc_archive 'CCDC 1005572'
