# Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry.
# This journal is © The Royal Society of Chemistry 2018

####################################################################### 
# 
# 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_1_a
_database_code_depnum_ccdc_archive 'CCDC 1844843'
_audit_update_record             
;
2018-05-23 deposited with the CCDC.
2018-11-01 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2014/7
_shelx_SHELXL_version_number     2014/7
_chemical_name_systematic        ?
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C53 H41 Cl3 N4'
_chemical_formula_weight         840.25

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0181 0.0091 '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 0.0311 0.0180 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Cl Cl 0.3639 0.7018 '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 2/c'
_space_group_name_Hall           '-C 2yc'

_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, y, -z+1/2'
'x+1/2, y+1/2, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y, z-1/2'
'-x+1/2, -y+1/2, -z'
'x+1/2, -y+1/2, z-1/2'

_cell_length_a                   25.4646(15)
_cell_length_b                   16.7733(9)
_cell_length_c                   10.4497(8)
_cell_angle_alpha                90
_cell_angle_beta                 100.998(6)
_cell_angle_gamma                90
_cell_volume                     4381.4(5)
_cell_formula_units_Z            4
_cell_measurement_temperature    293(2)
_cell_measurement_reflns_used    4154
_cell_measurement_theta_min      4.32
_cell_measurement_theta_max      72.172

_exptl_crystal_description       block
_exptl_crystal_colour            colorless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_F_000             1752
_exptl_transmission_factor_min   0.864
_exptl_transmission_factor_max   0.864
_exptl_crystal_size_max          0.220
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.180
_exptl_absorpt_coefficient_mu    2.210
_shelx_estimated_absorpt_T_min   0.642
_shelx_estimated_absorpt_T_max   0.692
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  ?
_exptl_absorpt_correction_T_max  ?
_exptl_absorpt_process_details   sadabs
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      293(2)
_diffrn_radiation_wavelength     1.54178
_diffrn_radiation_type           CuK\a
_diffrn_source                   ?
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       ?
_diffrn_detector_area_resol_mean ?
_diffrn_reflns_number            8719
_diffrn_reflns_av_unetI/netI     0.0267
_diffrn_reflns_av_R_equivalents  0.0231
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_theta_min         3.536
_diffrn_reflns_theta_max         74.902
_diffrn_reflns_theta_full        67.679
_diffrn_measured_fraction_theta_max 0.925
_diffrn_measured_fraction_theta_full 0.981
_diffrn_reflns_Laue_measured_fraction_max 0.925
_diffrn_reflns_Laue_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.925
_diffrn_reflns_point_group_measured_fraction_full 0.981
_reflns_number_total             4174
_reflns_number_gt                3434
_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       ?
_computing_cell_refinement       ?
_computing_data_reduction        ?
_computing_structure_solution    ?
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_molecular_graphics    ?
_computing_publication_material  ?
_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)+(0.1619P)²+2.5293P] 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     none
_refine_ls_extinction_coef       .
_refine_ls_number_reflns         4174
_refine_ls_number_parameters     290
_refine_ls_number_restraints     30
_refine_ls_R_factor_all          0.0900
_refine_ls_R_factor_gt           0.0801
_refine_ls_wR_factor_ref         0.2487
_refine_ls_wR_factor_gt          0.2265
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_restrained_S_all      1.100
_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
C1 C 0.50946(13) 0.8773(2) -0.0531(4) 0.0778(9) Uani 1 1 d . . . . .
H1A H 0.4852 0.8906 0.0034 0.117 Uiso 1 1 calc R U . . .
H1B H 0.4910 0.8465 -0.1254 0.117 Uiso 1 1 calc R U . . .
H1C H 0.5230 0.9253 -0.0849 0.117 Uiso 1 1 calc R U . . .
C2 C 0.55532(10) 0.82908(15) 0.0215(3) 0.0533(6) Uani 1 1 d . . . . .
C3 C 0.60616(10) 0.85932(13) 0.0438(2) 0.0463(5) Uani 1 1 d . . . . .
H3 H 0.6130 0.9095 0.0127 0.056 Uiso 1 1 calc R U . . .
C4 C 0.64715(9) 0.81380(12) 0.1134(2) 0.0430(5) Uani 1 1 d . . . . .
C5 C 0.63862(9) 0.73693(13) 0.1614(2) 0.0448(5) Uani 1 1 d . . . . .
C6 C 0.58650(10) 0.70767(15) 0.1405(3) 0.0587(7) Uani 1 1 d . . . . .
H6 H 0.5793 0.6580 0.1728 0.070 Uiso 1 1 calc R U . . .
C7 C 0.54604(11) 0.75278(17) 0.0721(3) 0.0639(7) Uani 1 1 d . . . . .
H7 H 0.5113 0.7330 0.0583 0.077 Uiso 1 1 calc R U . . .
C8 C 0.68949(9) 0.70972(13) 0.2302(3) 0.0483(6) Uani 1 1 d . . . . .
C9 C 0.72504(10) 0.77001(14) 0.2216(3) 0.0534(6) Uani 1 1 d . . . . .
H9 H 0.7612 0.7686 0.2587 0.064 Uiso 1 1 calc R U . . .
C10 C 0.70397(9) 0.63166(13) 0.2887(2) 0.0465(5) Uani 1 1 d . . . . .
C11 C 0.74637(9) 0.62239(13) 0.3935(3) 0.0485(6) Uani 1 1 d . . . . .
H11 H 0.7648 0.6669 0.4317 0.058 Uiso 1 1 calc R U . . .
C12 C 0.76116(9) 0.54662(13) 0.4411(2) 0.0456(5) Uani 1 1 d . . . . .
C13 C 0.69329(9) 0.48880(13) 0.2931(3) 0.0459(5) Uani 1 1 d . . . . .
C14 C 0.67718(9) 0.56274(14) 0.2406(3) 0.0482(6) Uani 1 1 d . . . . .
H14 H 0.6480 0.5662 0.1720 0.058 Uiso 1 1 calc R U . . .
C15 C 0.80732(10) 0.53323(14) 0.5482(2) 0.0495(6) Uani 1 1 d . . . . .
C16 C 0.85071(11) 0.58488(17) 0.5688(3) 0.0575(6) Uani 1 1 d . . . . .
H16 H 0.8501 0.6303 0.5175 0.069 Uiso 1 1 calc R U . . .
C17 C 0.89476(13) 0.5692(2) 0.6650(3) 0.0715(8) Uani 1 1 d . . . . .
H17 H 0.9238 0.6038 0.6785 0.086 Uiso 1 1 calc R U . . .
C18 C 0.89526(15) 0.5016(2) 0.7410(3) 0.0767(10) Uani 1 1 d . . . . .
H18 H 0.9251 0.4904 0.8048 0.092 Uiso 1 1 calc R U . . .
C19 C 0.85227(15) 0.4512(2) 0.7231(3) 0.0730(9) Uani 1 1 d . . . . .
H19 H 0.8528 0.4066 0.7761 0.088 Uiso 1 1 calc R U . . .
C20 C 0.80828(12) 0.46611(17) 0.6270(3) 0.0607(7) Uani 1 1 d . . . . .
H20 H 0.7793 0.4314 0.6149 0.073 Uiso 1 1 calc R U . . .
C21 C 0.66576(9) 0.41414(13) 0.2430(2) 0.0474(5) Uani 1 1 d . . . . .
C22 C 0.65076(11) 0.40136(16) 0.1103(3) 0.0568(6) Uani 1 1 d . . . . .
H22 H 0.6573 0.4403 0.0519 0.068 Uiso 1 1 calc R U . . .
C23 C 0.62601(13) 0.33065(19) 0.0643(4) 0.0700(8) Uani 1 1 d . . . . .
H23 H 0.6167 0.3218 -0.0250 0.084 Uiso 1 1 calc R U . . .
C24 C 0.61521(12) 0.27345(17) 0.1504(4) 0.0718(8) Uani 1 1 d . . . . .
H24 H 0.5982 0.2263 0.1190 0.086 Uiso 1 1 calc R U . . .
C25 C 0.62942(12) 0.28585(17) 0.2818(4) 0.0691(8) Uani 1 1 d . . . . .
H25 H 0.6217 0.2475 0.3398 0.083 Uiso 1 1 calc R U . . .
C26 C 0.65521(11) 0.35538(15) 0.3284(3) 0.0591(7) Uani 1 1 d . . . . .
H26 H 0.6656 0.3630 0.4178 0.071 Uiso 1 1 calc R U . . .
C27 C 0.4835(4) 0.4782(4) 0.2700(9) 0.142(3) Uani 0.5 1 d D U P A -1
H27 H 0.4557 0.4880 0.3214 0.170 Uiso 0.5 1 calc R U P A -1
Cl1 Cl 0.5315(4) 0.5378(4) 0.3477(10) 0.223(4) Uani 0.5 1 d D U P A -1
Cl2 Cl 0.4524(3) 0.5114(4) 0.1255(8) 0.194(3) Uani 0.5 1 d D U P A -1
Cl3 Cl 0.4905(2) 0.3830(2) 0.2891(6) 0.1841(19) Uani 0.5 1 d D U P A -1
N1 N 0.70027(8) 0.83191(11) 0.1517(2) 0.0516(5) Uani 1 1 d . . . . .
H1 H 0.7154 0.8754 0.1342 0.062 Uiso 1 1 calc R U . . .
N2 N 0.73504(8) 0.48026(11) 0.3923(2) 0.0466(5) Uani 1 1 d . . . . .


_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
C1 C2 1.509(4) . ?
C1 H1A 0.9600 . ?
C1 H1B 0.9600 . ?
C1 H1C 0.9600 . ?
C2 C3 1.368(4) . ?
C2 C7 1.422(4) . ?
C3 C4 1.383(3) . ?
C3 H3 0.9300 . ?
C4 N1 1.369(3) . ?
C4 C5 1.415(3) . ?
C5 C6 1.393(3) . ?
C5 C8 1.431(3) . ?
C6 C7 1.365(4) . ?
C6 H6 0.9300 . ?
C7 H7 0.9300 . ?
C8 C9 1.372(3) . ?
C8 C10 1.462(3) . ?
C9 N1 1.354(3) . ?
C9 H9 0.9300 . ?
C10 C14 1.387(3) . ?
C10 C11 1.392(4) . ?
C11 C12 1.390(3) . ?
C11 H11 0.9300 . ?
C12 N2 1.346(3) . ?
C12 C15 1.478(3) . ?
C13 N2 1.344(3) . ?
C13 C14 1.386(3) . ?
C13 C21 1.481(3) . ?
C14 H14 0.9300 . ?
C15 C16 1.388(4) . ?
C15 C20 1.393(4) . ?
C16 C17 1.381(4) . ?
C16 H16 0.9300 . ?
C17 C18 1.382(5) . ?
C17 H17 0.9300 . ?
C18 C19 1.368(6) . ?
C18 H18 0.9300 . ?
C19 C20 1.377(4) . ?
C19 H19 0.9300 . ?
C20 H20 0.9300 . ?
C21 C22 1.382(4) . ?
C21 C26 1.390(3) . ?
C22 C23 1.386(4) . ?
C22 H22 0.9300 . ?
C23 C24 1.378(5) . ?
C23 H23 0.9300 . ?
C24 C25 1.368(5) . ?
C24 H24 0.9300 . ?
C25 C26 1.381(4) . ?
C25 H25 0.9300 . ?
C26 H26 0.9300 . ?
C27 Cl3 1.615(7) . ?
C27 Cl2 1.662(7) . ?
C27 Cl1 1.666(6) . ?
C27 H27 0.9800 . ?
N1 H1 0.8600 . ?

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 C1 H1A 109.5 . . ?
C2 C1 H1B 109.5 . . ?
H1A C1 H1B 109.5 . . ?
C2 C1 H1C 109.5 . . ?
H1A C1 H1C 109.5 . . ?
H1B C1 H1C 109.5 . . ?
C3 C2 C7 119.3(2) . . ?
C3 C2 C1 120.2(2) . . ?
C7 C2 C1 120.5(2) . . ?
C2 C3 C4 118.7(2) . . ?
C2 C3 H3 120.7 . . ?
C4 C3 H3 120.7 . . ?
N1 C4 C3 129.5(2) . . ?
N1 C4 C5 107.96(19) . . ?
C3 C4 C5 122.5(2) . . ?
C6 C5 C4 118.2(2) . . ?
C6 C5 C8 135.3(2) . . ?
C4 C5 C8 106.46(19) . . ?
C7 C6 C5 119.2(2) . . ?
C7 C6 H6 120.4 . . ?
C5 C6 H6 120.4 . . ?
C6 C7 C2 122.1(2) . . ?
C6 C7 H7 119.0 . . ?
C2 C7 H7 119.0 . . ?
C9 C8 C5 106.1(2) . . ?
C9 C8 C10 124.8(2) . . ?
C5 C8 C10 128.9(2) . . ?
N1 C9 C8 110.8(2) . . ?
N1 C9 H9 124.6 . . ?
C8 C9 H9 124.6 . . ?
C14 C10 C11 116.5(2) . . ?
C14 C10 C8 121.8(2) . . ?
C11 C10 C8 121.7(2) . . ?
C12 C11 C10 120.0(2) . . ?
C12 C11 H11 120.0 . . ?
C10 C11 H11 120.0 . . ?
N2 C12 C11 122.7(2) . . ?
N2 C12 C15 115.2(2) . . ?
C11 C12 C15 122.1(2) . . ?
N2 C13 C14 122.1(2) . . ?
N2 C13 C21 115.74(19) . . ?
C14 C13 C21 122.1(2) . . ?
C13 C14 C10 120.9(2) . . ?
C13 C14 H14 119.5 . . ?
C10 C14 H14 119.5 . . ?
C16 C15 C20 119.3(3) . . ?
C16 C15 C12 121.1(2) . . ?
C20 C15 C12 119.5(2) . . ?
C17 C16 C15 120.4(3) . . ?
C17 C16 H16 119.8 . . ?
C15 C16 H16 119.8 . . ?
C16 C17 C18 119.4(3) . . ?
C16 C17 H17 120.3 . . ?
C18 C17 H17 120.3 . . ?
C19 C18 C17 120.6(3) . . ?
C19 C18 H18 119.7 . . ?
C17 C18 H18 119.7 . . ?
C18 C19 C20 120.4(3) . . ?
C18 C19 H19 119.8 . . ?
C20 C19 H19 119.8 . . ?
C19 C20 C15 119.9(3) . . ?
C19 C20 H20 120.1 . . ?
C15 C20 H20 120.1 . . ?
C22 C21 C26 118.9(2) . . ?
C22 C21 C13 120.5(2) . . ?
C26 C21 C13 120.6(2) . . ?
C21 C22 C23 120.1(3) . . ?
C21 C22 H22 119.9 . . ?
C23 C22 H22 119.9 . . ?
C24 C23 C22 120.2(3) . . ?
C24 C23 H23 119.9 . . ?
C22 C23 H23 119.9 . . ?
C25 C24 C23 120.1(3) . . ?
C25 C24 H24 119.9 . . ?
C23 C24 H24 119.9 . . ?
C24 C25 C26 120.0(3) . . ?
C24 C25 H25 120.0 . . ?
C26 C25 H25 120.0 . . ?
C25 C26 C21 120.6(3) . . ?
C25 C26 H26 119.7 . . ?
C21 C26 H26 119.7 . . ?
Cl3 C27 Cl2 117.8(5) . . ?
Cl3 C27 Cl1 118.6(5) . . ?
Cl2 C27 Cl1 114.9(5) . . ?
Cl3 C27 H27 99.9 . . ?
Cl2 C27 H27 99.9 . . ?
Cl1 C27 H27 99.9 . . ?
C9 N1 C4 108.67(19) . . ?
C9 N1 H1 125.7 . . ?
C4 N1 H1 125.7 . . ?
C13 N2 C12 117.70(19) . . ?

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
C7 C2 C3 C4 1.1(4) . . . . ?
C1 C2 C3 C4 179.5(3) . . . . ?
C2 C3 C4 N1 -177.4(2) . . . . ?
C2 C3 C4 C5 0.5(4) . . . . ?
N1 C4 C5 C6 176.4(2) . . . . ?
C3 C4 C5 C6 -2.0(4) . . . . ?
N1 C4 C5 C8 -0.2(3) . . . . ?
C3 C4 C5 C8 -178.6(2) . . . . ?
C4 C5 C6 C7 1.7(4) . . . . ?
C8 C5 C6 C7 177.1(3) . . . . ?
C5 C6 C7 C2 -0.1(5) . . . . ?
C3 C2 C7 C6 -1.3(5) . . . . ?
C1 C2 C7 C6 -179.7(3) . . . . ?
C6 C5 C8 C9 -175.2(3) . . . . ?
C4 C5 C8 C9 0.5(3) . . . . ?
C6 C5 C8 C10 10.2(5) . . . . ?
C4 C5 C8 C10 -174.1(2) . . . . ?
C5 C8 C9 N1 -0.7(3) . . . . ?
C10 C8 C9 N1 174.2(2) . . . . ?
C9 C8 C10 C14 -145.4(3) . . . . ?
C5 C8 C10 C14 28.2(4) . . . . ?
C9 C8 C10 C11 32.7(4) . . . . ?
C5 C8 C10 C11 -153.6(3) . . . . ?
C14 C10 C11 C12 2.5(3) . . . . ?
C8 C10 C11 C12 -175.8(2) . . . . ?
C10 C11 C12 N2 -2.0(4) . . . . ?
C10 C11 C12 C15 177.3(2) . . . . ?
N2 C13 C14 C10 0.2(4) . . . . ?
C21 C13 C14 C10 -179.5(2) . . . . ?
C11 C10 C14 C13 -1.6(3) . . . . ?
C8 C10 C14 C13 176.6(2) . . . . ?
N2 C12 C15 C16 150.8(2) . . . . ?
C11 C12 C15 C16 -28.5(3) . . . . ?
N2 C12 C15 C20 -26.9(3) . . . . ?
C11 C12 C15 C20 153.9(2) . . . . ?
C20 C15 C16 C17 1.1(4) . . . . ?
C12 C15 C16 C17 -176.6(2) . . . . ?
C15 C16 C17 C18 -0.1(4) . . . . ?
C16 C17 C18 C19 -1.1(5) . . . . ?
C17 C18 C19 C20 1.4(5) . . . . ?
C18 C19 C20 C15 -0.5(4) . . . . ?
C16 C15 C20 C19 -0.8(4) . . . . ?
C12 C15 C20 C19 176.9(2) . . . . ?
N2 C13 C21 C22 -136.5(2) . . . . ?
C14 C13 C21 C22 43.1(3) . . . . ?
N2 C13 C21 C26 42.6(3) . . . . ?
C14 C13 C21 C26 -137.7(3) . . . . ?
C26 C21 C22 C23 -0.5(4) . . . . ?
C13 C21 C22 C23 178.7(3) . . . . ?
C21 C22 C23 C24 1.4(5) . . . . ?
C22 C23 C24 C25 -0.7(5) . . . . ?
C23 C24 C25 C26 -0.8(5) . . . . ?
C24 C25 C26 C21 1.7(5) . . . . ?
C22 C21 C26 C25 -1.0(4) . . . . ?
C13 C21 C26 C25 179.8(2) . . . . ?
C8 C9 N1 C4 0.5(3) . . . . ?
C3 C4 N1 C9 178.0(2) . . . . ?
C5 C4 N1 C9 -0.2(3) . . . . ?
C14 C13 N2 C12 0.4(3) . . . . ?
C21 C13 N2 C12 -179.9(2) . . . . ?
C11 C12 N2 C13 0.5(3) . . . . ?
C15 C12 N2 C13 -178.82(19) . . . . ?

_refine_diff_density_max         0.504
_refine_diff_density_min         -0.682
_refine_diff_density_rms         0.085

