# Electronic Supplementary Material (ESI) for Chemical Communications.
# 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. 
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data_sa3771
_database_code_depnum_ccdc_archive 'CCDC 1048523'
_audit_update_record             
;
2015-02-10 deposited with the CCDC.
2015-05-11 downloaded from the CCDC.
;
_audit_creation_date             2014-12-04
_audit_creation_method           
;
Olex2 1.2
(compiled 2014.03.20 svn.r2914 for OlexSys, GUI svn.r4816)
;
_shelxl_version_number           2013-4
_chemical_name_common            ?
_chemical_name_systematic        
;
 ?
;
_chemical_formula_moiety         'C25 H21 Br N2 O2'
_chemical_formula_sum            'C25 H21 Br N2 O2'
_chemical_formula_weight         461.35
_chemical_absolute_configuration ad
_chemical_melting_point          ?
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'
Br Br -0.2901 2.4595 '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'

_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.
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_H-M_alt        'P 1 21 1'
_space_group_name_Hall           'P 2yb'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y+1/2, -z'

_cell_length_a                   10.912(2)
_cell_length_b                   8.3793(17)
_cell_length_c                   11.228(2)
_cell_angle_alpha                90
_cell_angle_beta                 93.81(3)
_cell_angle_gamma                90
_cell_volume                     1024.4(4)
_cell_formula_units_Z            2
_cell_measurement_reflns_used    3168
_cell_measurement_temperature    173.1500
_cell_measurement_theta_max      27.4793
_cell_measurement_theta_min      2.4307
_shelx_estimated_absorpt_T_max   ?
_shelx_estimated_absorpt_T_min   ?
_exptl_absorpt_coefficient_mu    2.031
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6805
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   ?
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.496
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_description       Plate
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.422
_exptl_crystal_size_mid          0.191
_exptl_crystal_size_min          0.051
_exptl_special_details           
;
 ?
;
_exptl_transmission_factor_max   ?
_exptl_transmission_factor_min   ?
_diffrn_reflns_av_R_equivalents  0.0418
_diffrn_reflns_av_unetI/netI     0.0471
_diffrn_reflns_Laue_measured_fraction_full 0.990
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            11644
_diffrn_reflns_point_group_measured_fraction_full 0.965
_diffrn_reflns_point_group_measured_fraction_max 0.956
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         27.465
_diffrn_reflns_theta_min         2.694
_diffrn_ambient_temperature      173.1500
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device       
;
Saturn724+ (2x2 bin mode)
;
_diffrn_measurement_device_details 
;
AFC10: Fixed Chi 2 circle
;
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       dtprofit.ref
_diffrn_number_total             2492
_diffrn_orient_matrix_type       d*Trek
_diffrn_orient_matrix_UB_11      -0.0011
_diffrn_orient_matrix_UB_12      -0.0142
_diffrn_orient_matrix_UB_13      0.0907
_diffrn_orient_matrix_UB_21      -0.0285
_diffrn_orient_matrix_UB_22      0.1145
_diffrn_orient_matrix_UB_23      0.0176
_diffrn_orient_matrix_UB_31      -0.0866
_diffrn_orient_matrix_UB_32      -0.0218
_diffrn_orient_matrix_UB_33      0.0015
_diffrn_radiation_detector       CCD
_diffrn_radiation_monochromator  'Graphite Monochromator'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_source                   'Sealed Tube'
_diffrn_source_current           30.0000
_diffrn_source_power             1.5000
_diffrn_source_voltage           50.0000
_diffrn_special_details          
;
 ?
;
_reflns_Friedel_coverage         0.811
_reflns_Friedel_fraction_full    0.936
_reflns_Friedel_fraction_max     0.920
_reflns_number_gt                4196
_reflns_number_total             4483
_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.
;
_reflns_threshold_expression     'I > 2σ(I)'
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2013)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2013)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2013)'
_computing_structure_solution    
;
 'XS (Sheldrick, 2013)'
;
_refine_diff_density_max         0.276
_refine_diff_density_min         -0.357
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details 
;
 Flack x determined using 1646 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.005(6)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.120
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         4483
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0431
_refine_ls_R_factor_gt           0.0388
_refine_ls_restrained_S_all      1.119
_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/[σ²(Fo²)+(0.0239P)²+0.1899P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0735
_refine_ls_wR_factor_ref         0.0754
_refine_special_details          
;
 ?
;
_olex2_refinement_description    
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C7(H7), C10(H10)
2.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B), C9(H9A,H9B), C19(H19A,H19B)
2.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C6(H6), C14(H14), C15(H15), C16(H16), C17(H17), C18(H18),
 C21(H21), C22(H22), C23(H23), C24(H24), C25(H25)
;
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     ?
_atom_sites_solution_secondary   ?
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
Br1 Br -0.06295(4) 0.08282(7) 0.65593(4) 0.04276(14) Uani 1 1 d . . . . .
O1 O 0.6538(2) 0.3366(4) 1.1014(2) 0.0312(6) Uani 1 1 d . . . . .
O2 O 0.3304(3) 0.4671(4) 1.2418(3) 0.0449(8) Uani 1 1 d . . . . .
N1 N 0.4334(3) 0.2918(4) 0.9822(3) 0.0221(7) Uani 1 1 d . . . . .
N2 N 0.4462(3) 0.3381(4) 1.1063(3) 0.0254(7) Uani 1 1 d . . . . .
C1 C 0.0899(4) 0.1859(5) 0.6927(4) 0.0295(9) Uani 1 1 d . . . . .
C2 C 0.1522(4) 0.2552(5) 0.6030(4) 0.0340(10) Uani 1 1 d . . . . .
H2 H 0.1172 0.2593 0.5253 0.041 Uiso 1 1 calc R . . . .
C3 C 0.2676(4) 0.3185(6) 0.6311(4) 0.0353(11) Uani 1 1 d . . . . .
H3 H 0.3103 0.3658 0.5714 0.042 Uiso 1 1 calc R . . . .
C4 C 0.3213(4) 0.3125(5) 0.7476(3) 0.0267(8) Uani 1 1 d . . . . .
C5 C 0.2529(3) 0.2521(4) 0.8378(3) 0.0241(8) Uani 1 1 d . . . . .
C6 C 0.1379(3) 0.1847(4) 0.8092(3) 0.0237(8) Uani 1 1 d . . . . .
H6 H 0.0938 0.1391 0.8686 0.028 Uiso 1 1 calc R . . . .
C7 C 0.3004(3) 0.2533(5) 0.9670(3) 0.0223(7) Uani 1 1 d . . . . .
H7 H 0.2912 0.1442 0.9966 0.027 Uiso 1 1 calc R . . . .
C8 C 0.4688(4) 0.4245(5) 0.9044(4) 0.0294(9) Uani 1 1 d . . . . .
H8A H 0.5540 0.4539 0.9228 0.035 Uiso 1 1 calc R . . . .
H8B H 0.4178 0.5173 0.9159 0.035 Uiso 1 1 calc R . . . .
C9 C 0.4506(4) 0.3650(5) 0.7773(4) 0.0300(9) Uani 1 1 d . . . . .
H9A H 0.4713 0.4496 0.7231 0.036 Uiso 1 1 calc R . . . .
H9B H 0.5057 0.2762 0.7663 0.036 Uiso 1 1 calc R . . . .
C10 C 0.2346(4) 0.3642(5) 1.0535(3) 0.0262(8) Uani 1 1 d . . . . .
H10 H 0.1709 0.3025 1.0905 0.031 Uiso 1 1 calc R . . . .
C11 C 0.3381(4) 0.3985(5) 1.1478(4) 0.0295(9) Uani 1 1 d . . . . .
C12 C 0.5653(4) 0.3361(5) 1.1621(4) 0.0252(8) Uani 1 1 d . . . . .
C13 C 0.5811(4) 0.3206(5) 1.2939(4) 0.0258(8) Uani 1 1 d . . . . .
C14 C 0.6932(4) 0.3732(5) 1.3481(4) 0.0301(10) Uani 1 1 d . . . . .
H14 H 0.7475 0.4303 1.3039 0.036 Uiso 1 1 calc R . . . .
C15 C 0.7231(4) 0.3405(6) 1.4668(4) 0.0363(10) Uani 1 1 d . . . . .
H15 H 0.7968 0.3780 1.5028 0.044 Uiso 1 1 calc R . . . .
C16 C 0.6451(4) 0.2530(6) 1.5326(4) 0.0377(10) Uani 1 1 d . . . . .
H16 H 0.6671 0.2292 1.6120 0.045 Uiso 1 1 calc R . . . .
C17 C 0.5339(4) 0.2005(5) 1.4803(4) 0.0354(10) Uani 1 1 d . . . . .
H17 H 0.4814 0.1408 1.5247 0.042 Uiso 1 1 calc R . . . .
C18 C 0.5006(4) 0.2367(5) 1.3621(4) 0.0313(9) Uani 1 1 d . . . . .
H18 H 0.4245 0.2048 1.3283 0.038 Uiso 1 1 calc R . . . .
C19 C 0.1787(4) 0.5244(5) 1.0097(4) 0.0286(9) Uani 1 1 d . . . . .
H19A H 0.1575 0.5851 1.0789 0.034 Uiso 1 1 calc R . . . .
H19B H 0.2416 0.5838 0.9715 0.034 Uiso 1 1 calc R . . . .
C20 C 0.0660(4) 0.5152(5) 0.9235(3) 0.0262(8) Uani 1 1 d . . . . .
C21 C 0.0656(4) 0.5939(8) 0.8147(3) 0.0368(9) Uani 1 1 d . . . . .
H21 H 0.1352 0.6490 0.7945 0.044 Uiso 1 1 calc R . . . .
C22 C -0.0375(4) 0.5909(8) 0.7360(4) 0.0488(11) Uani 1 1 d . . . . .
H22 H -0.0368 0.6433 0.6631 0.059 Uiso 1 1 calc R . . . .
C23 C -0.1418(5) 0.5100(6) 0.7659(5) 0.0476(13) Uani 1 1 d . . . . .
H23 H -0.2111 0.5079 0.7130 0.057 Uiso 1 1 calc R . . . .
C24 C -0.1427(4) 0.4327(5) 0.8743(4) 0.0382(11) Uani 1 1 d . . . . .
H24 H -0.2126 0.3786 0.8948 0.046 Uiso 1 1 calc R . . . .
C25 C -0.0392(4) 0.4358(5) 0.9523(4) 0.0300(9) Uani 1 1 d . . . . .
H25 H -0.0403 0.3836 1.0253 0.036 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
Br1 C1 1.899(4) . ?
O1 C12 1.218(5) . ?
O2 C11 1.209(5) . ?
N1 N2 1.445(4) . ?
N1 C7 1.486(4) . ?
N1 C8 1.481(5) . ?
N2 C11 1.392(5) . ?
N2 C12 1.405(5) . ?
C1 C2 1.380(6) . ?
C1 C6 1.376(5) . ?
C2 C3 1.384(6) . ?
C3 C4 1.398(6) . ?
C4 C5 1.393(5) . ?
C4 C9 1.495(5) . ?
C5 C6 1.394(5) . ?
C5 C7 1.508(5) . ?
C7 C10 1.554(5) . ?
C8 C9 1.512(6) . ?
C10 C11 1.524(5) . ?
C10 C19 1.541(5) . ?
C12 C13 1.484(5) . ?
C13 C14 1.401(6) . ?
C13 C18 1.393(6) . ?
C14 C15 1.379(6) . ?
C15 C16 1.375(6) . ?
C16 C17 1.384(6) . ?
C17 C18 1.386(6) . ?
C19 C20 1.516(5) . ?
C20 C21 1.387(6) . ?
C20 C25 1.384(6) . ?
C21 C22 1.384(6) . ?
C22 C23 1.385(8) . ?
C23 C24 1.379(7) . ?
C24 C25 1.382(6) . ?

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
N2 N1 C7 101.5(3) . . ?
N2 N1 C8 110.8(3) . . ?
C8 N1 C7 112.8(3) . . ?
C11 N2 N1 113.1(3) . . ?
C11 N2 C12 129.3(3) . . ?
C12 N2 N1 117.0(3) . . ?
C2 C1 Br1 120.0(3) . . ?
C6 C1 Br1 118.5(3) . . ?
C6 C1 C2 121.5(4) . . ?
C1 C2 C3 118.7(4) . . ?
C2 C3 C4 121.2(4) . . ?
C3 C4 C9 122.0(4) . . ?
C5 C4 C3 118.8(4) . . ?
C5 C4 C9 119.2(4) . . ?
C4 C5 C6 119.8(4) . . ?
C4 C5 C7 122.1(3) . . ?
C6 C5 C7 118.1(3) . . ?
C1 C6 C5 119.7(4) . . ?
N1 C7 C5 112.5(3) . . ?
N1 C7 C10 106.7(3) . . ?
C5 C7 C10 117.5(3) . . ?
N1 C8 C9 106.6(3) . . ?
C4 C9 C8 111.8(3) . . ?
C11 C10 C7 101.2(3) . . ?
C11 C10 C19 108.5(3) . . ?
C19 C10 C7 120.7(3) . . ?
O2 C11 N2 125.1(4) . . ?
O2 C11 C10 127.2(4) . . ?
N2 C11 C10 107.7(3) . . ?
O1 C12 N2 119.6(4) . . ?
O1 C12 C13 121.0(4) . . ?
N2 C12 C13 119.2(3) . . ?
C14 C13 C12 116.5(4) . . ?
C18 C13 C12 123.8(4) . . ?
C18 C13 C14 118.9(4) . . ?
C15 C14 C13 120.1(4) . . ?
C16 C15 C14 120.6(4) . . ?
C15 C16 C17 119.9(4) . . ?
C16 C17 C18 120.2(4) . . ?
C17 C18 C13 120.1(4) . . ?
C20 C19 C10 116.5(3) . . ?
C21 C20 C19 119.5(4) . . ?
C25 C20 C19 121.7(4) . . ?
C25 C20 C21 118.7(4) . . ?
C22 C21 C20 120.5(5) . . ?
C21 C22 C23 120.1(5) . . ?
C24 C23 C22 119.8(4) . . ?
C23 C24 C25 119.8(4) . . ?
C24 C25 C20 121.1(4) . . ?

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
Br1 C1 C2 C3 -175.1(3) . . . . ?
Br1 C1 C6 C5 176.7(3) . . . . ?
O1 C12 C13 C14 26.2(5) . . . . ?
O1 C12 C13 C18 -143.8(4) . . . . ?
N1 N2 C11 O2 -168.1(4) . . . . ?
N1 N2 C11 C10 11.2(4) . . . . ?
N1 N2 C12 O1 18.6(5) . . . . ?
N1 N2 C12 C13 -156.7(3) . . . . ?
N1 C7 C10 C11 -25.2(4) . . . . ?
N1 C7 C10 C19 94.4(4) . . . . ?
N1 C8 C9 C4 57.8(4) . . . . ?
N2 N1 C7 C5 161.5(3) . . . . ?
N2 N1 C7 C10 31.3(3) . . . . ?
N2 N1 C8 C9 -179.2(3) . . . . ?
N2 C12 C13 C14 -158.6(4) . . . . ?
N2 C12 C13 C18 31.4(6) . . . . ?
C1 C2 C3 C4 0.2(7) . . . . ?
C2 C1 C6 C5 -1.2(6) . . . . ?
C2 C3 C4 C5 -4.7(7) . . . . ?
C2 C3 C4 C9 173.7(4) . . . . ?
C3 C4 C5 C6 6.3(6) . . . . ?
C3 C4 C5 C7 -175.2(4) . . . . ?
C3 C4 C9 C8 152.0(4) . . . . ?
C4 C5 C6 C1 -3.4(6) . . . . ?
C4 C5 C7 N1 -12.2(5) . . . . ?
C4 C5 C7 C10 112.2(4) . . . . ?
C5 C4 C9 C8 -29.7(5) . . . . ?
C5 C7 C10 C11 -152.4(3) . . . . ?
C5 C7 C10 C19 -32.9(5) . . . . ?
C6 C1 C2 C3 2.8(6) . . . . ?
C6 C5 C7 N1 166.3(3) . . . . ?
C6 C5 C7 C10 -69.3(5) . . . . ?
C7 N1 N2 C11 -26.9(4) . . . . ?
C7 N1 N2 C12 161.0(3) . . . . ?
C7 N1 C8 C9 -66.2(4) . . . . ?
C7 C5 C6 C1 178.0(3) . . . . ?
C7 C10 C11 O2 -171.8(4) . . . . ?
C7 C10 C11 N2 8.9(4) . . . . ?
C7 C10 C19 C20 69.6(5) . . . . ?
C8 N1 N2 C11 93.0(4) . . . . ?
C8 N1 N2 C12 -79.0(4) . . . . ?
C8 N1 C7 C5 42.9(4) . . . . ?
C8 N1 C7 C10 -87.2(4) . . . . ?
C9 C4 C5 C6 -172.1(4) . . . . ?
C9 C4 C5 C7 6.3(6) . . . . ?
C10 C19 C20 C21 -125.5(4) . . . . ?
C10 C19 C20 C25 57.2(5) . . . . ?
C11 N2 C12 O1 -151.9(4) . . . . ?
C11 N2 C12 C13 32.8(6) . . . . ?
C11 C10 C19 C20 -174.5(3) . . . . ?
C12 N2 C11 O2 2.7(7) . . . . ?
C12 N2 C11 C10 -178.0(4) . . . . ?
C12 C13 C14 C15 -169.8(4) . . . . ?
C12 C13 C18 C17 167.0(4) . . . . ?
C13 C14 C15 C16 1.5(7) . . . . ?
C14 C13 C18 C17 -2.7(6) . . . . ?
C14 C15 C16 C17 -1.7(7) . . . . ?
C15 C16 C17 C18 -0.4(7) . . . . ?
C16 C17 C18 C13 2.6(6) . . . . ?
C18 C13 C14 C15 0.6(6) . . . . ?
C19 C10 C11 O2 60.2(6) . . . . ?
C19 C10 C11 N2 -119.1(4) . . . . ?
C19 C20 C21 C22 -178.2(5) . . . . ?
C19 C20 C25 C24 178.0(4) . . . . ?
C20 C21 C22 C23 0.5(9) . . . . ?
C21 C20 C25 C24 0.7(6) . . . . ?
C21 C22 C23 C24 0.1(8) . . . . ?
C22 C23 C24 C25 -0.3(7) . . . . ?
C23 C24 C25 C20 -0.1(6) . . . . ?
C25 C20 C21 C22 -0.9(8) . . . . ?

