# 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_mc229fi
_database_code_depnum_ccdc_archive 'CCDC 1829465'
_audit_update_record             
;
2018-03-13 deposited with the CCDC.
2018-10-08 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-97
_chemical_name_systematic        
;
 Boc-(S)-(\aMe)Aze-(S)-Ala-(S)-(\aMe)Aze-(S)-Ala-OMe
;
_chemical_name_common            ?
_chemical_melting_point          ?
_chemical_formula_moiety         ?
_chemical_formula_sum            'C22 H36 N4 O7'
_chemical_formula_weight         468.55
_chemical_absolute_configuration syn


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'
O O 0.0492 0.0322 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'I 1 2 1'
_symmetry_space_group_name_H-M_alt 'C 1 2 1'

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

_cell_length_a                   20.6903(3)
_cell_length_b                   5.75339(9)
_cell_length_c                   23.2601(3)
_cell_angle_alpha                90.00
_cell_angle_beta                 110.085(2)
_cell_angle_gamma                90.00
_cell_volume                     2600.48(6)
_cell_formula_units_Z            4
_cell_measurement_temperature    293(2)
_cell_measurement_reflns_used    15490
_cell_measurement_theta_min      2.0550
_cell_measurement_theta_max      69.2560

_exptl_crystal_description       needle
_exptl_crystal_colour            colourless
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_exptl_crystal_density_meas      ?
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1008
_exptl_absorpt_coefficient_mu    0.742
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.45739
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_process_details   
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;

_exptl_special_details           
;
 ?
;

_diffrn_ambient_temperature      293(2)
_diffrn_radiation_wavelength     1.54178
_diffrn_radiation_type           CuK\a
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_monochromator  graphite
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_measurement_method       'ω scans'
_diffrn_detector                 'CCD plate'
_diffrn_detector_type            Eos
_diffrn_detector_area_resol_mean 16.1274
_diffrn_standards_number         ?
_diffrn_standards_interval_count ?
_diffrn_standards_interval_time  ?
_diffrn_standards_decay_%        ?
_diffrn_reflns_number            33463
_diffrn_reflns_av_R_equivalents  0.0296
_diffrn_reflns_av_sigmaI/netI    0.0128
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_theta_min         2.47
_diffrn_reflns_theta_max         69.41
_reflns_number_total             4498
_reflns_number_gt                4316
_reflns_threshold_expression     >2sigma(I)

_computing_data_collection       
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_cell_refinement       
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_data_reduction        
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.31 (release 14-01-2014 CrysAlis171 .NET)
(compiled Jan 14 2014,18:38:05)
;
_computing_structure_solution    'SIR2002 (Burla et al., 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_molecular_graphics    ?
_computing_publication_material  ?

_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)+(0.0780P)²+0.4976P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_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   0.0(2)
_refine_ls_number_reflns         4498
_refine_ls_number_parameters     298
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0401
_refine_ls_R_factor_gt           0.0387
_refine_ls_wR_factor_ref         0.1187
_refine_ls_wR_factor_gt          0.1166
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_restrained_S_all      1.057
_refine_ls_shift/su_max          0.001
_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
C01 C 1.00139(13) -0.2933(5) 0.13588(12) 0.0774(7) Uani 1 1 d . . .
C02 C 0.93688(14) -0.4390(7) 0.11170(15) 0.1056(11) Uani 1 1 d . . .
H02A H 0.9323 -0.5332 0.1442 0.158 Uiso 1 1 calc R . .
H02B H 0.9398 -0.5374 0.0793 0.158 Uiso 1 1 calc R . .
H02C H 0.8975 -0.3390 0.0963 0.158 Uiso 1 1 calc R . .
C03 C 1.06228(16) -0.4544(8) 0.1583(2) 0.1420(18) Uani 1 1 d . . .
H03A H 1.1038 -0.3647 0.1736 0.213 Uiso 1 1 calc R . .
H03B H 1.0639 -0.5506 0.1251 0.213 Uiso 1 1 calc R . .
H03C H 1.0579 -0.5506 0.1905 0.213 Uiso 1 1 calc R . .
C04 C 1.0045(4) -0.1117(10) 0.0904(2) 0.172(2) Uani 1 1 d . . .
H04A H 0.9648 -0.0131 0.0808 0.258 Uiso 1 1 calc R . .
H04B H 1.0054 -0.1861 0.0538 0.258 Uiso 1 1 calc R . .
H04C H 1.0454 -0.0199 0.1076 0.258 Uiso 1 1 calc R . .
OU O 0.99241(6) -0.1721(3) 0.18833(6) 0.0640(4) Uani 1 1 d . . .
C0 C 1.04392(9) -0.0473(4) 0.22714(10) 0.0602(5) Uani 1 1 d . . .
O0 O 1.09839(8) -0.0090(4) 0.22141(10) 0.0912(6) Uani 1 1 d . . .
N1 N 1.02528(7) 0.0430(3) 0.27292(7) 0.0555(4) Uani 1 1 d . . .
C1A C 0.97875(8) -0.0489(3) 0.30431(8) 0.0504(4) Uani 1 1 d . . .
C1B1 C 1.02482(11) 0.0786(5) 0.36290(9) 0.0683(5) Uani 1 1 d . . .
H1B1 H 1.0038 0.2165 0.3728 0.082 Uiso 1 1 calc R . .
H1B2 H 1.0429 -0.0219 0.3983 0.082 Uiso 1 1 calc R . .
C1G C 1.07589(10) 0.1295(4) 0.33045(11) 0.0726(6) Uani 1 1 d . . .
H1G1 H 1.0866 0.2932 0.3294 0.087 Uiso 1 1 calc R . .
H1G2 H 1.1175 0.0370 0.3452 0.087 Uiso 1 1 calc R . .
C1B2 C 0.97854(11) -0.3115(4) 0.31078(11) 0.0641(5) Uani 1 1 d . . .
H1B3 H 0.9534 -0.3799 0.2718 0.096 Uiso 1 1 calc R . .
H1B4 H 0.9570 -0.3527 0.3399 0.096 Uiso 1 1 calc R . .
H1B5 H 1.0250 -0.3680 0.3246 0.096 Uiso 1 1 calc R . .
C1 C 0.90471(8) 0.0423(3) 0.27994(7) 0.0464(4) Uani 1 1 d . . .
O1 O 0.87349(6) 0.0784(3) 0.31501(5) 0.0630(4) Uani 1 1 d . . .
N2 N 0.87686(7) 0.0714(4) 0.21971(6) 0.0558(4) Uani 1 1 d . . .
H2 H 0.9016 0.0465 0.1973 0.067 Uiso 1 1 calc R . .
C2A C 0.80604(8) 0.1439(4) 0.19079(7) 0.0524(5) Uani 1 1 d . . .
H2A H 0.7778 0.0711 0.2121 0.063 Uiso 1 1 calc R . .
C2B C 0.79846(10) 0.4087(5) 0.19267(9) 0.0679(6) Uani 1 1 d . . .
H2B1 H 0.8196 0.4626 0.2340 0.102 Uiso 1 1 calc R . .
H2B2 H 0.7505 0.4490 0.1782 0.102 Uiso 1 1 calc R . .
H2B3 H 0.8205 0.4803 0.1670 0.102 Uiso 1 1 calc R . .
C2 C 0.78238(8) 0.0561(4) 0.12486(7) 0.0518(4) Uani 1 1 d . . .
O2 O 0.82453(6) 0.0041(3) 0.10051(6) 0.0719(5) Uani 1 1 d . . .
N3 N 0.71486(7) 0.0494(3) 0.09551(6) 0.0525(4) Uani 1 1 d . . .
C3A C 0.67313(9) -0.0520(4) 0.03488(8) 0.0568(5) Uani 1 1 d . . .
C3B1 C 0.60847(10) 0.0072(6) 0.05058(10) 0.0767(7) Uani 1 1 d . . .
H3B1 H 0.5817 0.1347 0.0267 0.092 Uiso 1 1 calc R . .
H3B2 H 0.5794 -0.1260 0.0497 0.092 Uiso 1 1 calc R . .
C3G C 0.65470(9) 0.0777(5) 0.11522(9) 0.0625(5) Uani 1 1 d . . .
H3G1 H 0.6476 0.2360 0.1261 0.075 Uiso 1 1 calc R . .
H3G2 H 0.6537 -0.0306 0.1469 0.075 Uiso 1 1 calc R . .
C3B2 C 0.68627(16) -0.3112(5) 0.03060(11) 0.0835(7) Uani 1 1 d . . .
H3B3 H 0.7328 -0.3346 0.0322 0.125 Uiso 1 1 calc R . .
H3B4 H 0.6551 -0.3713 -0.0073 0.125 Uiso 1 1 calc R . .
H3B5 H 0.6792 -0.3909 0.0642 0.125 Uiso 1 1 calc R . .
C3 C 0.67788(9) 0.0693(4) -0.02167(8) 0.0538(4) Uani 1 1 d . . .
O3 O 0.62632(7) 0.0951(4) -0.06646(6) 0.0764(5) Uani 1 1 d . . .
N4 N 0.74074(8) 0.1328(3) -0.01921(7) 0.0593(4) Uani 1 1 d . . .
H4 H 0.7736 0.1356 0.0156 0.071 Uiso 1 1 calc R . .
C4A C 0.75456(11) 0.1968(4) -0.07383(9) 0.0631(5) Uani 1 1 d . . .
H4A H 0.7213 0.3151 -0.0961 0.076 Uiso 1 1 calc R . .
C4B C 0.82728(14) 0.2962(6) -0.05694(13) 0.0892(8) Uani 1 1 d . . .
H4B1 H 0.8315 0.4308 -0.0315 0.134 Uiso 1 1 calc R . .
H4B2 H 0.8358 0.3392 -0.0936 0.134 Uiso 1 1 calc R . .
H4B3 H 0.8601 0.1810 -0.0352 0.134 Uiso 1 1 calc R . .
C4 C 0.74724(11) -0.0157(5) -0.11449(9) 0.0650(6) Uani 1 1 d . . .
O4 O 0.75016(14) -0.2086(4) -0.09746(9) 0.1050(7) Uani 1 1 d . . .
OT O 0.73747(11) 0.0447(4) -0.17139(7) 0.0945(6) Uani 1 1 d . . .
CT C 0.73707(17) -0.1472(8) -0.21295(13) 0.1041(11) Uani 1 1 d . . .
HT1 H 0.7801 -0.1506 -0.2201 0.156 Uiso 1 1 calc R . .
HT2 H 0.7002 -0.1252 -0.2511 0.156 Uiso 1 1 calc R . .
HT3 H 0.7307 -0.2915 -0.1949 0.156 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
C01 OU 1.471(3) . ?
C01 C03 1.506(5) . ?
C01 C04 1.504(5) . ?
C01 C02 1.512(4) . ?
OU C0 1.344(2) . ?
C0 O0 1.200(2) . ?
C0 N1 1.354(3) . ?
N1 C1G 1.474(2) . ?
N1 C1A 1.491(2) . ?
C1A C1B2 1.519(3) . ?
C1A C1 1.532(2) . ?
C1A C1B1 1.553(3) . ?
C1B1 C1G 1.523(4) . ?
C1 O1 1.220(2) . ?
C1 N2 1.330(2) . ?
N2 C2A 1.448(2) . ?
C2A C2 1.527(2) . ?
C2A C2B 1.534(4) . ?
C2 O2 1.229(2) . ?
C2 N3 1.328(2) . ?
N3 C3G 1.476(2) . ?
N3 C3A 1.496(2) . ?
C3A C3 1.522(3) . ?
C3A C3B2 1.525(4) . ?
C3A C3B1 1.541(3) . ?
C3B1 C3G 1.534(3) . ?
C3 O3 1.217(2) . ?
C3 N4 1.333(3) . ?
N4 C4A 1.442(3) . ?
C4A C4 1.521(4) . ?
C4A C4B 1.529(3) . ?
C4 O4 1.173(3) . ?
C4 OT 1.315(3) . ?
OT CT 1.466(4) . ?

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
OU C01 C03 109.5(3) . . ?
OU C01 C04 107.6(3) . . ?
C03 C01 C04 116.0(4) . . ?
OU C01 C02 102.97(18) . . ?
C03 C01 C02 108.3(3) . . ?
C04 C01 C02 111.7(3) . . ?
C0 OU C01 120.89(16) . . ?
O0 C0 OU 125.6(2) . . ?
O0 C0 N1 123.3(2) . . ?
OU C0 N1 111.02(15) . . ?
C0 N1 C1G 122.54(16) . . ?
C0 N1 C1A 130.96(17) . . ?
C1G N1 C1A 92.98(15) . . ?
N1 C1A C1B2 115.18(17) . . ?
N1 C1A C1 115.43(14) . . ?
C1B2 C1A C1 109.93(16) . . ?
N1 C1A C1B1 87.56(15) . . ?
C1B2 C1A C1B1 113.88(17) . . ?
C1 C1A C1B1 113.41(16) . . ?
C1G C1B1 C1A 88.69(16) . . ?
N1 C1G C1B1 89.28(15) . . ?
O1 C1 N2 123.08(15) . . ?
O1 C1 C1A 120.19(14) . . ?
N2 C1 C1A 116.70(14) . . ?
C1 N2 C2A 121.94(14) . . ?
N2 C2A C2 107.21(14) . . ?
N2 C2A C2B 111.70(17) . . ?
C2 C2A C2B 110.88(16) . . ?
O2 C2 N3 122.93(15) . . ?
O2 C2 C2A 120.66(14) . . ?
N3 C2 C2A 116.36(14) . . ?
C2 N3 C3G 133.42(14) . . ?
C2 N3 C3A 131.35(15) . . ?
C3G N3 C3A 93.49(13) . . ?
N3 C3A C3 116.64(17) . . ?
N3 C3A C3B2 112.62(17) . . ?
C3 C3A C3B2 109.04(19) . . ?
N3 C3A C3B1 87.55(15) . . ?
C3 C3A C3B1 114.98(17) . . ?
C3B2 C3A C3B1 114.9(2) . . ?
C3G C3B1 C3A 89.49(14) . . ?
N3 C3G C3B1 88.54(14) . . ?
O3 C3 N4 123.96(19) . . ?
O3 C3 C3A 119.85(18) . . ?
N4 C3 C3A 116.12(15) . . ?
C3 N4 C4A 121.18(16) . . ?
N4 C4A C4 109.55(19) . . ?
N4 C4A C4B 110.14(18) . . ?
C4 C4A C4B 109.8(2) . . ?
O4 C4 OT 124.2(3) . . ?
O4 C4 C4A 124.6(2) . . ?
OT C4 C4A 111.2(2) . . ?
C4 OT CT 115.4(3) . . ?

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
C03 C01 OU C0 56.1(3) . . . . ?
C04 C01 OU C0 -70.7(4) . . . . ?
C02 C01 OU C0 171.2(2) . . . . ?
C01 OU C0 O0 5.3(3) . . . . ?
C01 OU C0 N1 -178.1(2) . . . . y
O0 C0 N1 C1G -21.0(3) . . . . ?
OU C0 N1 C1G 162.32(19) . . . . ?
O0 C0 N1 C1A -150.4(2) . . . . ?
OU C0 N1 C1A 32.9(3) . . . . y
C0 N1 C1A C1B2 33.3(3) . . . . ?
C1G N1 C1A C1B2 -106.02(18) . . . . ?
C0 N1 C1A C1 -96.5(2) . . . . y
C1G N1 C1A C1 124.14(17) . . . . ?
C0 N1 C1A C1B1 148.6(2) . . . . ?
C1G N1 C1A C1B1 9.30(16) . . . . ?
N1 C1A C1B1 C1G -8.99(15) . . . . ?
C1B2 C1A C1B1 C1G 107.6(2) . . . . ?
C1 C1A C1B1 C1G -125.72(18) . . . . ?
C0 N1 C1G C1B1 -153.8(2) . . . . ?
C1A N1 C1G C1B1 -9.47(17) . . . . ?
C1A C1B1 C1G N1 9.08(16) . . . . ?
N1 C1A C1 O1 -143.92(19) . . . . ?
C1B2 C1A C1 O1 83.7(2) . . . . ?
C1B1 C1A C1 O1 -45.0(3) . . . . ?
N1 C1A C1 N2 38.1(3) . . . . y
C1B2 C1A C1 N2 -94.2(2) . . . . ?
C1B1 C1A C1 N2 137.0(2) . . . . ?
O1 C1 N2 C2A -1.5(3) . . . . ?
C1A C1 N2 C2A 176.42(19) . . . . y
C1 N2 C2A C2 -154.8(2) . . . . y
C1 N2 C2A C2B 83.5(2) . . . . ?
N2 C2A C2 O2 -20.0(3) . . . . ?
C2B C2A C2 O2 102.1(2) . . . . ?
N2 C2A C2 N3 162.65(19) . . . . y
C2B C2A C2 N3 -75.2(2) . . . . ?
O2 C2 N3 C3G 172.4(2) . . . . ?
C2A C2 N3 C3G -10.4(4) . . . . ?
O2 C2 N3 C3A 11.6(4) . . . . ?
C2A C2 N3 C3A -171.2(2) . . . . y
C2 N3 C3A C3 -69.6(3) . . . . y
C3G N3 C3A C3 124.26(19) . . . . ?
C2 N3 C3A C3B2 57.6(3) . . . . ?
C3G N3 C3A C3B2 -108.6(2) . . . . ?
C2 N3 C3A C3B1 173.6(2) . . . . ?
C3G N3 C3A C3B1 7.42(19) . . . . ?
N3 C3A C3B1 C3G -7.12(18) . . . . ?
C3 C3A C3B1 C3G -125.5(2) . . . . ?
C3B2 C3A C3B1 C3G 106.7(2) . . . . ?
C2 N3 C3G C3B1 -173.1(3) . . . . ?
C3A N3 C3G C3B1 -7.45(19) . . . . ?
C3A C3B1 C3G N3 7.22(19) . . . . ?
N3 C3A C3 O3 -139.4(2) . . . . ?
C3B2 C3A C3 O3 91.7(3) . . . . ?
C3B1 C3A C3 O3 -39.0(3) . . . . ?
N3 C3A C3 N4 43.4(3) . . . . y
C3B2 C3A C3 N4 -85.5(2) . . . . ?
C3B1 C3A C3 N4 143.8(2) . . . . ?
O3 C3 N4 C4A -12.2(3) . . . . ?
C3A C3 N4 C4A 164.9(2) . . . . y
C3 N4 C4A C4 -67.6(3) . . . . y
C3 N4 C4A C4B 171.5(2) . . . . ?
N4 C4A C4 O4 -20.5(3) . . . . ?
C4B C4A C4 O4 100.6(3) . . . . ?
N4 C4A C4 OT 159.77(18) . . . . y
C4B C4A C4 OT -79.1(2) . . . . ?
O4 C4 OT CT -5.9(4) . . . . ?
C4A C4 OT CT 173.8(2) . . . . y

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
N2 H2 OU 0.86 2.33 3.068(2) 144.3 .
N4 H4 O2 0.86 2.04 2.827(2) 152.0 .

_diffrn_measured_fraction_theta_max 0.996
_diffrn_reflns_theta_full        69.42
_diffrn_measured_fraction_theta_full 0.996
_refine_diff_density_max         0.222
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.029

#===END===
_exptl_crystal_recrystallization_method 
'Re-crystallisation from solvent: ethyl acetate / di-isopropyl ether'
