# Electronic Supplementary Material (ESI) for RSC Advances.
# This journal is © The Royal Society of Chemistry 2016

####################################################################### 
# 
# 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. 
# 
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data_cd16047
_database_code_depnum_ccdc_archive 'CCDC 1478601'
_audit_update_record             
;
2016-05-07 deposited with the CCDC.
2016-07-22 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2013
_chemical_name_systematic        FM2
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C20 H22 N2 O6'
_chemical_formula_weight         386.39

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      orthorhombic
_space_group_IT_number           61
_space_group_name_H-M_alt        'P b c a'
_space_group_name_Hall           '-P 2ac 2ab'

_shelx_space_group_comment       
; 
The symmetry employed for this shelxl refinement is uniquely defined 
by the following loop, which should always be used as a source of 
symmetry information in preference to the above space-group names. 
They are only intended as comments. 
;

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

_cell_length_a                   11.177(4)
_cell_length_b                   10.727(4)
_cell_length_c                   29.751(11)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     3567(2)
_cell_formula_units_Z            8
_cell_measurement_temperature    293(2)
_cell_measurement_reflns_used    883
_cell_measurement_theta_min      5.439
_cell_measurement_theta_max      36.904

_exptl_crystal_description       prismatic
_exptl_crystal_colour            yellow
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.439
_exptl_crystal_F_000             1632
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.160
_exptl_crystal_size_mid          0.110
_exptl_crystal_size_min          0.060
_exptl_absorpt_coefficient_mu    0.107
_shelx_estimated_absorpt_T_min   0.983
_shelx_estimated_absorpt_T_max   0.994
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.6098
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_process_details   sadabs

_exptl_special_details           
; 
 ? 
;

_diffrn_ambient_temperature      293(2)
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_type           MoK\a
_diffrn_source                   ?
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_detector_area_resol_mean ?
_diffrn_reflns_number            18539
_diffrn_reflns_av_unetI/netI     0.1199
_diffrn_reflns_av_R_equivalents  0.1857
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_theta_min         2.279
_diffrn_reflns_theta_max         24.998
_diffrn_reflns_theta_full        25.242
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measured_fraction_theta_full 0.974
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_Laue_measured_fraction_full 0.974
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_point_group_measured_fraction_full 0.974
_reflns_number_total             3143
_reflns_number_gt                1661
_reflns_threshold_expression     'I > 2σ(I)'
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_max     .
_reflns_Friedel_fraction_full    .

_reflns_special_details          
; 
 Reflections were merged by SHELXL according to the crystal 
 class for the calculation of statistics and refinement. 
  
 _reflns_Friedel_fraction is defined as the number of unique 
 Friedel pairs measured divided by the number that would be 
 possible theoretically, ignoring centric projections and 
 systematic absences. 
;

_computing_data_collection       'Bruker SMART'
_computing_cell_refinement       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'

_refine_special_details          
; 
 ? 
;
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type           full
_refine_ls_weighting_scheme      calc
_refine_ls_weighting_details     
'w=1/[σ²(Fo²)+(0.0588P)²] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     SHELXL
_refine_ls_extinction_coef       0.0042(14)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_number_reflns         3143
_refine_ls_number_parameters     256
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1455
_refine_ls_R_factor_gt           0.0687
_refine_ls_wR_factor_ref         0.1587
_refine_ls_wR_factor_gt          0.1290
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_restrained_S_all      1.018
_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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
N1 N 0.4123(2) 0.2771(3) 0.61840(9) 0.0442(8) Uani 1 1 d . . . . .
N2 N 0.4122(2) 0.2833(3) 0.40296(9) 0.0460(8) Uani 1 1 d . . . . .
O1 O 0.5160(2) 0.1015(3) 0.60183(8) 0.0551(8) Uani 1 1 d . . . . .
O2 O 0.3123(2) 0.4558(3) 0.63524(9) 0.0577(8) Uani 1 1 d . . . . .
O3 O 0.3597(2) 0.5382(2) 0.42637(8) 0.0570(8) Uani 1 1 d . . . . .
O4 O 0.5581(3) 0.3579(3) 0.32195(9) 0.0730(9) Uani 1 1 d . . . . .
H4 H 0.5896 0.4209 0.3321 0.110 Uiso 1 1 calc R U . . .
O5 O 0.5508(2) 0.3668(3) 0.70360(9) 0.0698(9) Uani 1 1 d . . . . .
O6 O 0.6596(3) 0.6027(3) 0.72376(12) 0.0956(11) Uani 1 1 d . . . . .
H6 H 0.5942 0.6042 0.7113 0.143 Uiso 1 1 calc R U . . .
C1 C 0.4682(3) 0.1973(4) 0.58774(12) 0.0425(9) Uani 1 1 d . . . . .
C2 C 0.3565(3) 0.3873(4) 0.60626(13) 0.0438(10) Uani 1 1 d . . . . .
C3 C 0.3501(3) 0.4175(3) 0.55819(11) 0.0362(9) Uani 1 1 d . . . . .
C4 C 0.4021(3) 0.3368(3) 0.52582(11) 0.0341(9) Uani 1 1 d . . . . .
C5 C 0.4658(3) 0.2312(3) 0.54067(12) 0.0374(9) Uani 1 1 d . . . . .
C6 C 0.5271(3) 0.1606(3) 0.50913(12) 0.0429(10) Uani 1 1 d . . . . .
H6A H 0.5758 0.0958 0.5190 0.051 Uiso 1 1 calc R U . . .
C7 C 0.5180(3) 0.1834(4) 0.46388(13) 0.0455(10) Uani 1 1 d . . . . .
H7 H 0.5628 0.1355 0.4440 0.055 Uiso 1 1 calc R U . . .
C8 C 0.4433(3) 0.2765(3) 0.44702(12) 0.0391(9) Uani 1 1 d . . . . .
C9 C 0.3941(3) 0.3657(3) 0.47907(11) 0.0363(9) Uani 1 1 d . . . . .
C10 C 0.3455(3) 0.4853(4) 0.46804(12) 0.0413(9) Uani 1 1 d . . . . .
C11 C 0.2955(3) 0.5605(4) 0.50021(13) 0.0447(10) Uani 1 1 d . . . . .
H11 H 0.2606 0.6356 0.4918 0.054 Uiso 1 1 calc R U . . .
C12 C 0.2965(3) 0.5262(4) 0.54491(13) 0.0452(10) Uani 1 1 d . . . . .
H12 H 0.2605 0.5774 0.5662 0.054 Uiso 1 1 calc R U . . .
C13 C 0.2993(3) 0.3444(4) 0.39101(12) 0.0519(11) Uani 1 1 d . . . . .
H13A H 0.2397 0.3245 0.4136 0.062 Uiso 1 1 calc R U . . .
H13B H 0.2715 0.3114 0.3625 0.062 Uiso 1 1 calc R U . . .
C14 C 0.3103(4) 0.4816(4) 0.38742(13) 0.0577(12) Uani 1 1 d . . . . .
H14A H 0.3603 0.5015 0.3618 0.069 Uiso 1 1 calc R U . . .
H14B H 0.2317 0.5167 0.3819 0.069 Uiso 1 1 calc R U . . .
C15 C 0.4688(3) 0.2024(4) 0.36923(12) 0.0507(10) Uani 1 1 d . . . . .
H15A H 0.4131 0.1892 0.3447 0.061 Uiso 1 1 calc R U . . .
H15B H 0.4854 0.1220 0.3827 0.061 Uiso 1 1 calc R U . . .
C16 C 0.5822(3) 0.2551(4) 0.35087(13) 0.0573(11) Uani 1 1 d . . . . .
H16A H 0.6329 0.2822 0.3755 0.069 Uiso 1 1 calc R U . . .
H16B H 0.6247 0.1910 0.3343 0.069 Uiso 1 1 calc R U . . .
C17 C 0.4093(3) 0.2357(4) 0.66546(12) 0.0553(11) Uani 1 1 d . . . . .
H17A H 0.3825 0.1497 0.6661 0.066 Uiso 1 1 calc R U . . .
H17B H 0.3503 0.2852 0.6813 0.066 Uiso 1 1 calc R U . . .
C18 C 0.5258(4) 0.2442(4) 0.69056(13) 0.0596(12) Uani 1 1 d . . . . .
H18A H 0.5221 0.1915 0.7170 0.071 Uiso 1 1 calc R U . . .
H18B H 0.5900 0.2137 0.6716 0.071 Uiso 1 1 calc R U . . .
C19 C 0.6600(4) 0.3768(5) 0.72830(15) 0.0781(15) Uani 1 1 d . . . . .
H19A H 0.7273 0.3661 0.7081 0.094 Uiso 1 1 calc R U . . .
H19B H 0.6635 0.3112 0.7507 0.094 Uiso 1 1 calc R U . . .
C20 C 0.6684(6) 0.4958(5) 0.7500(2) 0.115(2) Uani 1 1 d . . . . .
H20A H 0.6060 0.4997 0.7726 0.138 Uiso 1 1 calc R U . . .
H20B H 0.7444 0.4988 0.7657 0.138 Uiso 1 1 calc R U . . .


_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
N1 C2 1.384(5) . ?
N1 C1 1.398(5) . ?
N1 C17 1.469(4) . ?
N2 C8 1.358(4) . ?
N2 C13 1.465(4) . ?
N2 C15 1.470(4) . ?
O1 C1 1.232(4) . ?
O2 C2 1.236(4) . ?
O3 C10 1.373(4) . ?
O3 C14 1.420(4) . ?
O4 C16 1.425(5) . ?
O4 H4 0.8200 . ?
O5 C18 1.400(5) . ?
O5 C19 1.429(5) . ?
O6 C20 1.390(6) . ?
O6 H6 0.8200 . ?
C1 C5 1.447(5) . ?
C2 C3 1.468(5) . ?
C3 C12 1.369(5) . ?
C3 C4 1.420(4) . ?
C4 C5 1.409(5) . ?
C4 C9 1.428(4) . ?
C5 C6 1.387(5) . ?
C6 C7 1.372(5) . ?
C6 H6A 0.9300 . ?
C7 C8 1.395(5) . ?
C7 H7 0.9300 . ?
C8 C9 1.459(5) . ?
C9 C10 1.431(5) . ?
C10 C11 1.371(5) . ?
C11 C12 1.380(5) . ?
C11 H11 0.9300 . ?
C12 H12 0.9300 . ?
C13 C14 1.481(5) . ?
C13 H13A 0.9700 . ?
C13 H13B 0.9700 . ?
C14 H14A 0.9700 . ?
C14 H14B 0.9700 . ?
C15 C16 1.492(5) . ?
C15 H15A 0.9700 . ?
C15 H15B 0.9700 . ?
C16 H16A 0.9700 . ?
C16 H16B 0.9700 . ?
C17 C18 1.504(5) . ?
C17 H17A 0.9700 . ?
C17 H17B 0.9700 . ?
C18 H18A 0.9700 . ?
C18 H18B 0.9700 . ?
C19 C20 1.434(6) . ?
C19 H19A 0.9700 . ?
C19 H19B 0.9700 . ?
C20 H20A 0.9700 . ?
C20 H20B 0.9700 . ?

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
C2 N1 C1 123.6(3) . . ?
C2 N1 C17 119.8(3) . . ?
C1 N1 C17 116.5(3) . . ?
C8 N2 C13 118.6(3) . . ?
C8 N2 C15 121.1(3) . . ?
C13 N2 C15 117.9(3) . . ?
C10 O3 C14 121.0(3) . . ?
C16 O4 H4 109.5 . . ?
C18 O5 C19 112.5(3) . . ?
C20 O6 H6 109.5 . . ?
O1 C1 N1 118.8(3) . . ?
O1 C1 C5 123.2(4) . . ?
N1 C1 C5 118.0(3) . . ?
O2 C2 N1 120.4(3) . . ?
O2 C2 C3 121.9(4) . . ?
N1 C2 C3 117.7(3) . . ?
C12 C3 C4 120.2(3) . . ?
C12 C3 C2 119.4(3) . . ?
C4 C3 C2 120.4(3) . . ?
C5 C4 C3 119.0(3) . . ?
C5 C4 C9 120.8(3) . . ?
C3 C4 C9 120.2(3) . . ?
C6 C5 C4 118.4(3) . . ?
C6 C5 C1 120.6(3) . . ?
C4 C5 C1 121.0(3) . . ?
C7 C6 C5 122.0(3) . . ?
C7 C6 H6A 119.0 . . ?
C5 C6 H6A 119.0 . . ?
C6 C7 C8 121.6(3) . . ?
C6 C7 H7 119.2 . . ?
C8 C7 H7 119.2 . . ?
N2 C8 C7 122.6(3) . . ?
N2 C8 C9 119.9(3) . . ?
C7 C8 C9 117.4(3) . . ?
C4 C9 C10 116.2(3) . . ?
C4 C9 C8 118.1(3) . . ?
C10 C9 C8 125.6(3) . . ?
C11 C10 O3 115.8(3) . . ?
C11 C10 C9 121.5(3) . . ?
O3 C10 C9 122.2(3) . . ?
C10 C11 C12 120.9(4) . . ?
C10 C11 H11 119.6 . . ?
C12 C11 H11 119.6 . . ?
C3 C12 C11 120.6(3) . . ?
C3 C12 H12 119.7 . . ?
C11 C12 H12 119.7 . . ?
N2 C13 C14 113.0(3) . . ?
N2 C13 H13A 109.0 . . ?
C14 C13 H13A 109.0 . . ?
N2 C13 H13B 109.0 . . ?
C14 C13 H13B 109.0 . . ?
H13A C13 H13B 107.8 . . ?
O3 C14 C13 113.5(3) . . ?
O3 C14 H14A 108.9 . . ?
C13 C14 H14A 108.9 . . ?
O3 C14 H14B 108.9 . . ?
C13 C14 H14B 108.9 . . ?
H14A C14 H14B 107.7 . . ?
N2 C15 C16 113.1(3) . . ?
N2 C15 H15A 109.0 . . ?
C16 C15 H15A 109.0 . . ?
N2 C15 H15B 109.0 . . ?
C16 C15 H15B 109.0 . . ?
H15A C15 H15B 107.8 . . ?
O4 C16 C15 110.7(3) . . ?
O4 C16 H16A 109.5 . . ?
C15 C16 H16A 109.5 . . ?
O4 C16 H16B 109.5 . . ?
C15 C16 H16B 109.5 . . ?
H16A C16 H16B 108.1 . . ?
N1 C17 C18 115.8(3) . . ?
N1 C17 H17A 108.3 . . ?
C18 C17 H17A 108.3 . . ?
N1 C17 H17B 108.3 . . ?
C18 C17 H17B 108.3 . . ?
H17A C17 H17B 107.4 . . ?
O5 C18 C17 111.5(3) . . ?
O5 C18 H18A 109.3 . . ?
C17 C18 H18A 109.3 . . ?
O5 C18 H18B 109.3 . . ?
C17 C18 H18B 109.3 . . ?
H18A C18 H18B 108.0 . . ?
O5 C19 C20 110.7(4) . . ?
O5 C19 H19A 109.5 . . ?
C20 C19 H19A 109.5 . . ?
O5 C19 H19B 109.5 . . ?
C20 C19 H19B 109.5 . . ?
H19A C19 H19B 108.1 . . ?
O6 C20 C19 118.5(5) . . ?
O6 C20 H20A 107.7 . . ?
C19 C20 H20A 107.7 . . ?
O6 C20 H20B 107.7 . . ?
C19 C20 H20B 107.7 . . ?
H20A C20 H20B 107.1 . . ?

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
C2 N1 C1 O1 179.7(3) . . . . ?
C17 N1 C1 O1 -3.4(5) . . . . ?
C2 N1 C1 C5 -1.0(5) . . . . ?
C17 N1 C1 C5 175.9(3) . . . . ?
C1 N1 C2 O2 -177.5(3) . . . . ?
C17 N1 C2 O2 5.7(5) . . . . ?
C1 N1 C2 C3 3.6(5) . . . . ?
C17 N1 C2 C3 -173.2(3) . . . . ?
O2 C2 C3 C12 1.8(5) . . . . ?
N1 C2 C3 C12 -179.4(3) . . . . ?
O2 C2 C3 C4 179.9(3) . . . . ?
N1 C2 C3 C4 -1.3(5) . . . . ?
C12 C3 C4 C5 174.5(3) . . . . ?
C2 C3 C4 C5 -3.6(5) . . . . ?
C12 C3 C4 C9 -2.8(5) . . . . ?
C2 C3 C4 C9 179.1(3) . . . . ?
C3 C4 C5 C6 -173.1(3) . . . . ?
C9 C4 C5 C6 4.2(5) . . . . ?
C3 C4 C5 C1 6.4(5) . . . . ?
C9 C4 C5 C1 -176.3(3) . . . . ?
O1 C1 C5 C6 -5.5(5) . . . . ?
N1 C1 C5 C6 175.3(3) . . . . ?
O1 C1 C5 C4 175.1(3) . . . . ?
N1 C1 C5 C4 -4.2(5) . . . . ?
C4 C5 C6 C7 -6.5(5) . . . . ?
C1 C5 C6 C7 174.1(3) . . . . ?
C5 C6 C7 C8 -2.1(5) . . . . ?
C13 N2 C8 C7 153.9(3) . . . . ?
C15 N2 C8 C7 -8.5(5) . . . . ?
C13 N2 C8 C9 -23.4(5) . . . . ?
C15 N2 C8 C9 174.2(3) . . . . ?
C6 C7 C8 N2 -165.0(3) . . . . ?
C6 C7 C8 C9 12.4(5) . . . . ?
C5 C4 C9 C10 -169.7(3) . . . . ?
C3 C4 C9 C10 7.6(4) . . . . ?
C5 C4 C9 C8 6.0(5) . . . . ?
C3 C4 C9 C8 -176.8(3) . . . . ?
N2 C8 C9 C4 163.5(3) . . . . ?
C7 C8 C9 C4 -14.0(5) . . . . ?
N2 C8 C9 C10 -21.3(5) . . . . ?
C7 C8 C9 C10 161.2(3) . . . . ?
C14 O3 C10 C11 -124.7(4) . . . . ?
C14 O3 C10 C9 63.5(4) . . . . ?
C4 C9 C10 C11 -8.0(5) . . . . ?
C8 C9 C10 C11 176.6(3) . . . . ?
C4 C9 C10 O3 163.2(3) . . . . ?
C8 C9 C10 O3 -12.1(5) . . . . ?
O3 C10 C11 C12 -168.2(3) . . . . ?
C9 C10 C11 C12 3.6(5) . . . . ?
C4 C3 C12 C11 -2.0(5) . . . . ?
C2 C3 C12 C11 176.1(3) . . . . ?
C10 C11 C12 C3 1.6(5) . . . . ?
C8 N2 C13 C14 83.9(4) . . . . ?
C15 N2 C13 C14 -113.1(4) . . . . ?
C10 O3 C14 C13 -28.5(5) . . . . ?
N2 C13 C14 O3 -53.9(4) . . . . ?
C8 N2 C15 C16 -86.6(4) . . . . ?
C13 N2 C15 C16 110.9(4) . . . . ?
N2 C15 C16 O4 -72.1(4) . . . . ?
C2 N1 C17 C18 -108.8(4) . . . . ?
C1 N1 C17 C18 74.1(4) . . . . ?
C19 O5 C18 C17 178.8(3) . . . . ?
N1 C17 C18 O5 77.3(4) . . . . ?
C18 O5 C19 C20 -166.3(4) . . . . ?
O5 C19 C20 O6 -56.3(7) . . . . ?

loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_site_symmetry_A
C18 H18B O1 0.97 2.54 3.053(5) 113.3 .
C15 H15B O1 0.97 2.44 3.377(5) 161.9 5_656
C14 H14A O5 0.97 2.60 3.520(5) 158.2 5_666
O6 H6 O4 0.82 2.01 2.819(5) 169.0 5_666
O4 H4 O2 0.82 1.97 2.778(4) 166.6 5_666

_refine_diff_density_max         0.335
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.071

_shelxl_version_number           2013-4


_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_solvent_exptl_crystal_recrystallization_method dichloromethane
_exptl_crystal_preparation       Luminescent
