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Volume 71 | Part 12 | December 2015 | Pages 1536–1538
https://doi.org/10.1107/S2056989015021507
Open open access

access

ISSN: 2056-9890

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CRYSTALLOGRAPHIC
COMMUNICATIONS

Volume 71 | Part 12 | December 2015 | Pages 1536–1538
https://doi.org/10.1107/S2056989015021507
Open open access

access

ISSN: 2056-9890

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##############################################################################
# #
# This CIF contains the data in a paper accepted for publication in #
# Acta Crystallographica Section E. It conforms to the requirements of #
# Notes for Authors for Acta Crystallographica Section E, and has been #
# peer reviewed under the auspices of the IUCr Commission on Journals. #
# #
# Full details of the Crystallographic Information File format #
# are given in the paper "The Crystallographic Information File (CIF): #
# a New Standard Archive File for Crystallography" by S. R. Hall, F. H. #
# Allen and I. D. Brown [Acta Cryst. (1991), A47, 655-685]. #
# #
# The current version of the core CIF dictionary is obtainable from #
# ftp://ftp.iucr.org/pub/cif_core.dic. #
# #
# Software is freely available for graphical display of the structure(s) #
# in this CIF. For information consult the CIF software page #
# http://www.iucr.org/resources/cif/software. #
# #
# This file may be used for bona fide research purposes within the #
# scientific community so long as proper attribution is given to the journal # 
# article from which it was obtained. #
# #
##############################################################################
data_I
_audit_creation_method SHELXL-2014
_database_code_depnum_ccdc_archive 'CCDC 1436825'
_chemical_name_systematic
;
(1aR,4E,7aS,8E,10aS,10bR)-1a,5-\
Dimethyl-8-[(pyrimidin-5-yl)methylidene]-2,3,6,7,7a,8,10a,10b-\
octahydrooxireno[2',3':9,10]cyclodeca[1,2-b]furan-9(1aH)-one
;
_chemical_name_common '(E)-13-(Pyrimidin-5-yl)parthenolide'
_chemical_formula_moiety 'C19 H22 N2 O3'
_chemical_formula_sum 'C19 H22 N2 O3'
_chemical_formula_iupac 'C19 H22 N2 O3'
_chemical_formula_weight 326.38
_chemical_melting_point ?

_space_group_crystal_system monoclinic
_space_group_name_H-M_alt 'P 21'
_space_group_name_Hall 'P 2yb'
loop_
 _space_group_symop_operation_xyz
 'x, y, z'
 '-x, y+1/2, -z'
_cell_length_a 10.3526(2)
_cell_length_b 7.26120(10)
_cell_length_c 11.9198(2)
_cell_angle_alpha 90
_cell_angle_beta 108.1210(6)
_cell_angle_gamma 90
_cell_volume 851.60(2)
_cell_formula_units_Z 2
_cell_measurement_reflns_used 9908
_cell_measurement_theta_min 4.49
_cell_measurement_theta_max 68.18
_cell_measurement_temperature 90.0(2)
_exptl_crystal_description 'solvent-rounded block'
_exptl_crystal_colour colourless
_exptl_crystal_size_max 0.250
_exptl_crystal_size_mid 0.130
_exptl_crystal_size_min 0.100
_exptl_crystal_density_diffrn 1.273
_exptl_crystal_density_meas ?
_exptl_crystal_density_method ?
_exptl_crystal_F_000 348
_exptl_absorpt_coefficient_mu 0.700
_exptl_absorpt_correction_type multi-scan
_exptl_absorpt_process_details
;
(SADABS; Bruker, 2006)
;

_exptl_absorpt_correction_T_min 0.850
_exptl_absorpt_correction_T_max 0.942
_exptl_special_details
;
The crystal was mounted with polyisobutene oil on the tip of a fine glass fibre,
which was fastened in a copper mounting pin with electrical solder. It was
placed directly into the cold gas stream of a liquid nitrogen based cryostat,
according to published methods.
Diffraction data were collected with the crystal at 90 K, which is standard
practice in this laboratory for the majority of flash-cooled crystals.
The crystals were large, and could not be cut to size without inducing damage
by crushing, leading to shattered, frayed ends. These damaged parts could
easily be dissolved away, however, to give solvent-rounded undamaged pieces of
optimal size for data collection.
;
_diffrn_ambient_temperature 90.0(2)
_diffrn_radiation_type CuK\a
_diffrn_radiation_wavelength 1.54178
_diffrn_measurement_device_type 'Bruker X8 Proteum diffractometer'
_diffrn_measurement_method '\f and \w scans'
_diffrn_detector_area_resol_mean 5.6
_diffrn_reflns_number 11370
_diffrn_reflns_av_R_equivalents 0.0323
_diffrn_reflns_theta_min 4.494
_diffrn_reflns_theta_max 68.178
_diffrn_reflns_theta_full 67.679
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measured_fraction_theta_full 0.982
_diffrn_reflns_limit_h_min -12
_diffrn_reflns_limit_h_max 10
_diffrn_reflns_limit_k_min -8
_diffrn_reflns_limit_k_max 8
_diffrn_reflns_limit_l_min -14
_diffrn_reflns_limit_l_max 13
_refine_special_details
;
Refinement progress was checked using PLATON (Spek, 2009) and by an
R-tensor (Parkin, 2000). The final model was further checked with the
IUCr utility checkCIF.
;
_reflns_number_total 3020
_reflns_number_gt 3013
_reflns_threshold_expression 'I > 2\s(I)'
_refine_ls_structure_factor_coef Fsqd
_refine_ls_matrix_type full
_refine_ls_R_factor_all 0.0268
_refine_ls_R_factor_gt 0.0267
_refine_ls_wR_factor_gt 0.0677
_refine_ls_wR_factor_ref 0.0678
_refine_ls_goodness_of_fit_ref 1.053
_refine_ls_restrained_S_all 1.052
_refine_ls_number_reflns 3020
_refine_ls_number_parameters 220
_refine_ls_number_restraints 1
_refine_ls_hydrogen_treatment constr
_refine_ls_weighting_scheme calc
_refine_ls_weighting_details
 'w=1/[\s^2^(Fo^2^)+(0.0326P)^2^+0.1773P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_hydrogens difmap
_atom_sites_solution_primary direct
_atom_sites_solution_secondary difmap
_refine_ls_shift/su_max 0.000
_refine_ls_shift/su_mean 0.000
_refine_diff_density_max 0.149
_refine_diff_density_min -0.135
_refine_ls_extinction_method 'SHELXL-2014'
_refine_ls_extinction_coef 0.010(2)
_refine_ls_extinction_expression
 'Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^'
_refine_ls_abs_structure_details
;
Flack x determined using 1354 quotients
[(I^+^)-(I^-^)]/[(I^+^)+(I^-^)]
(Parsons et al., 2013).
;
_refine_ls_abs_structure_Flack -0.04(3)
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'
_computing_data_collection
;
APEX2 (Bruker, 2006)
;
_computing_cell_refinement
;
SAINT (Bruker, 2006)
;
_computing_data_reduction
;
SAINT (Bruker, 2006)
;
_computing_structure_solution
;
SHELXS97 (Sheldrick, 2008)
;
_computing_structure_refinement
;
SHELXL2014 (Sheldrick, 2015)
;
_computing_molecular_graphics
;
XP in SHELXTL (Sheldrick, 2008)
;
_computing_publication_material
;
SHELXTL (Sheldrick, 2008) and CIFFIX (Parkin,
2013)
;
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_U_iso_or_equiv
 _atom_site_adp_type
 _atom_site_calc_flag
 _atom_site_occupancy
 _atom_site_disorder_assembly
 _atom_site_disorder_group
 O O1 0.59428(12) 0.24072(19) 0.48957(10) 0.0228(3) Uani d 1 . .
 O O2 0.30633(12) 0.25486(17) 0.43887(10) 0.0195(3) Uani d 1 . .
 O O3 0.12397(13) 0.29255(19) 0.49855(11) 0.0266(3) Uani d 1 . .
 C C1 0.57679(17) 0.5285(2) 0.19945(14) 0.0185(4) Uani d 1 . .
 H H1A 0.5833 0.6439 0.2384 0.022 Uiso calc 1 . .
 C C2 0.70386(17) 0.4134(3) 0.23289(16) 0.0208(4) Uani d 1 . .
 H H2A 0.7809 0.4881 0.2257 0.025 Uiso calc 1 . .
 H H2B 0.6915 0.3076 0.1781 0.025 Uiso calc 1 . .
 C C3 0.73676(17) 0.3417(3) 0.36116(15) 0.0202(4) Uani d 1 . .
 H H3A 0.8146 0.2554 0.3792 0.024 Uiso calc 1 . .
 H H3B 0.7615 0.4460 0.4173 0.024 Uiso calc 1 . .
 C C4 0.61322(17) 0.2447(2) 0.37345(14) 0.0178(4) Uani d 1 . .
 C C5 0.51035(16) 0.3615(2) 0.40010(13) 0.0165(3) Uani d 1 . .
 H H5A 0.5353 0.4948 0.4118 0.020 Uiso calc 1 . .
 C C6 0.35977(16) 0.3252(2) 0.34753(14) 0.0159(3) Uani d 1 . .
 H H6A 0.3445 0.2321 0.2829 0.019 Uiso calc 1 . .
 C C7 0.27894(16) 0.5036(2) 0.29783(13) 0.0149(3) Uani d 1 . .
 H H7A 0.3396 0.6113 0.3292 0.018 Uiso calc 1 . .
 C C8 0.22800(16) 0.5184(3) 0.16174(14) 0.0176(4) Uani d 1 . .
 H H8A 0.1434 0.5923 0.1376 0.021 Uiso calc 1 . .
 H H8B 0.2058 0.3936 0.1278 0.021 Uiso calc 1 . .
 C C9 0.33322(17) 0.6078(3) 0.11062(14) 0.0185(4) Uani d 1 . .
 H H9A 0.2884 0.6358 0.0261 0.022 Uiso calc 1 . .
 H H9B 0.3638 0.7258 0.1519 0.022 Uiso calc 1 . .
 C C10 0.45591(17) 0.4887(2) 0.12176(14) 0.0179(4) Uani d 1 . .
 C C11 0.16862(16) 0.5027(2) 0.35605(14) 0.0159(3) Uani d 1 . .
 C C12 0.19100(17) 0.3425(3) 0.43718(14) 0.0184(4) Uani d 1 . .
 C C13 0.06867(17) 0.6212(3) 0.35248(14) 0.0179(4) Uani d 1 . .
 H H13A 0.0096 0.5872 0.3961 0.021 Uiso calc 1 . .
 C C14 0.42876(19) 0.3267(3) 0.03864(16) 0.0269(4) Uani d 1 . .
 H H14A 0.5140 0.2609 0.0473 0.040 Uiso calc 1 . .
 H H14B 0.3908 0.3705 -0.0428 0.040 Uiso calc 1 . .
 H H14C 0.3639 0.2434 0.0573 0.040 Uiso calc 1 . .
 C C15 0.57578(18) 0.0643(2) 0.30934(18) 0.0239(4) Uani d 1 . .
 H H15A 0.5012 0.0072 0.3311 0.036 Uiso calc 1 . .
 H H15B 0.6548 -0.0179 0.3312 0.036 Uiso calc 1 . .
 H H15C 0.5470 0.0861 0.2240 0.036 Uiso calc 1 . .
 C C16 0.03901(16) 0.7977(2) 0.28928(14) 0.0180(4) Uani d 1 . .
 C C17 0.13568(18) 0.9097(3) 0.26601(18) 0.0244(4) Uani d 1 . .
 H H17A 0.2281 0.8719 0.2933 0.029 Uiso calc 1 . .
 N N18 0.10538(16) 1.0688(2) 0.20684(16) 0.0293(4) Uani d 1 . .
 C C19 -0.02533(19) 1.1156(3) 0.17269(17) 0.0252(4) Uani d 1 . .
 H H19A -0.0485 1.2265 0.1287 0.030 Uiso calc 1 . .
 N N20 -0.12697(15) 1.0248(2) 0.19312(14) 0.0256(4) Uani d 1 . .
 C C21 -0.09291(18) 0.8673(3) 0.25279(15) 0.0219(4) Uani d 1 . .
 H H21A -0.1621 0.7994 0.2713 0.026 Uiso calc 1 . .
loop_
 _atom_site_aniso_label
 _atom_site_aniso_U_11
 _atom_site_aniso_U_22
 _atom_site_aniso_U_33
 _atom_site_aniso_U_12
 _atom_site_aniso_U_13
 _atom_site_aniso_U_23
 O1 0.0188(6) 0.0306(7) 0.0176(6) 0.0061(5) 0.0035(5) 0.0092(5)
 O2 0.0187(6) 0.0200(6) 0.0221(6) 0.0038(5) 0.0098(5) 0.0064(5)
 O3 0.0242(6) 0.0305(8) 0.0303(7) 0.0031(6) 0.0162(5) 0.0097(6)
 C1 0.0218(8) 0.0163(8) 0.0197(8) -0.0006(7) 0.0100(7) 0.0024(7)
 C2 0.0184(8) 0.0208(9) 0.0254(9) -0.0018(7) 0.0101(7) -0.0001(7)
 C3 0.0157(8) 0.0216(9) 0.0228(8) 0.0016(7) 0.0053(6) -0.0004(7)
 C4 0.0163(8) 0.0184(8) 0.0174(8) 0.0036(7) 0.0031(6) 0.0040(7)
 C5 0.0175(8) 0.0173(8) 0.0141(7) 0.0020(7) 0.0043(6) 0.0031(6)
 C6 0.0173(8) 0.0162(8) 0.0154(7) 0.0002(6) 0.0068(6) 0.0012(6)
 C7 0.0155(7) 0.0147(8) 0.0142(7) -0.0011(6) 0.0041(6) -0.0008(6)
 C8 0.0172(8) 0.0201(8) 0.0143(8) 0.0005(7) 0.0034(6) 0.0003(7)
 C9 0.0209(8) 0.0195(8) 0.0147(7) 0.0018(7) 0.0051(6) 0.0044(7)
 C10 0.0221(8) 0.0190(9) 0.0150(7) 0.0003(7) 0.0092(7) 0.0026(7)
 C11 0.0153(7) 0.0170(8) 0.0143(7) -0.0021(7) 0.0031(6) -0.0010(7)
 C12 0.0166(8) 0.0206(9) 0.0187(8) 0.0004(7) 0.0065(6) 0.0014(7)
 C13 0.0144(8) 0.0213(9) 0.0175(8) -0.0011(7) 0.0044(6) -0.0018(7)
 C14 0.0258(9) 0.0321(11) 0.0219(8) 0.0041(8) 0.0061(7) -0.0061(8)
 C15 0.0206(8) 0.0177(9) 0.0346(10) 0.0023(7) 0.0105(8) 0.0005(7)
 C16 0.0175(8) 0.0190(9) 0.0161(7) 0.0009(7) 0.0032(6) -0.0044(7)
 C17 0.0156(8) 0.0189(9) 0.0350(10) 0.0005(7) 0.0024(8) 0.0019(8)
 N18 0.0209(8) 0.0216(9) 0.0409(10) -0.0014(6) 0.0030(7) 0.0062(7)
 C19 0.0240(9) 0.0183(9) 0.0288(9) 0.0021(8) 0.0016(7) 0.0019(8)
 N20 0.0206(8) 0.0232(8) 0.0304(8) 0.0042(6) 0.0043(6) 0.0003(7)
 C21 0.0194(8) 0.0219(9) 0.0253(9) 0.0026(7) 0.0084(7) -0.0024(7)
_geom_special_details
;
All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes)
are estimated using the full covariance matrix. The cell e.s.d.'s are taken
into account individually in the estimation of e.s.d.'s in distances, angles
and torsion angles; correlations between e.s.d.'s in cell parameters are only
used when they are defined by crystal symmetry. An approximate (isotropic)
treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s.
planes.
;
loop_
 _geom_bond_atom_site_label_1
 _geom_bond_atom_site_label_2
 _geom_bond_site_symmetry_2
 _geom_bond_distance
 _geom_bond_publ_flag
 O1 C5 . 1.444(2) ?
 O1 C4 . 1.457(2) ?
 O2 C12 . 1.348(2) ?
 O2 C6 . 1.4585(19) ?
 O3 C12 . 1.210(2) ?
 C1 C10 . 1.337(2) ?
 C1 C2 . 1.504(2) ?
 C1 H1A . 0.9500 ?
 C2 C3 . 1.549(2) ?
 C2 H2A . 0.9900 ?
 C2 H2B . 0.9900 ?
 C3 C4 . 1.507(2) ?
 C3 H3A . 0.9900 ?
 C3 H3B . 0.9900 ?
 C4 C5 . 1.471(2) ?
 C4 C15 . 1.505(3) ?
 C5 C6 . 1.511(2) ?
 C5 H5A . 1.0000 ?
 C6 C7 . 1.556(2) ?
 C6 H6A . 1.0000 ?
 C7 C11 . 1.510(2) ?
 C7 C8 . 1.546(2) ?
 C7 H7A . 1.0000 ?
 C8 C9 . 1.547(2) ?
 C8 H8A . 0.9900 ?
 C8 H8B . 0.9900 ?
 C9 C10 . 1.508(2) ?
 C9 H9A . 0.9900 ?
 C9 H9B . 0.9900 ?
 C10 C14 . 1.507(3) ?
 C11 C13 . 1.336(2) ?
 C11 C12 . 1.484(2) ?
 C13 C16 . 1.470(2) ?
 C13 H13A . 0.9500 ?
 C14 H14A . 0.9800 ?
 C14 H14B . 0.9800 ?
 C14 H14C . 0.9800 ?
 C15 H15A . 0.9800 ?
 C15 H15B . 0.9800 ?
 C15 H15C . 0.9800 ?
 C16 C17 . 1.383(3) ?
 C16 C21 . 1.393(2) ?
 C17 N18 . 1.339(2) ?
 C17 H17A . 0.9500 ?
 N18 C19 . 1.330(2) ?
 C19 N20 . 1.327(3) ?
 C19 H19A . 0.9500 ?
 N20 C21 . 1.335(3) ?
 C21 H21A . 0.9500 ?
loop_
 _geom_angle_atom_site_label_1
 _geom_angle_atom_site_label_2
 _geom_angle_atom_site_label_3
 _geom_angle_site_symmetry_1
 _geom_angle_site_symmetry_3
 _geom_angle
 _geom_angle_publ_flag
 C5 O1 C4 . . 60.94(10) ?
 C12 O2 C6 . . 111.31(12) ?
 C10 C1 C2 . . 128.05(17) ?
 C10 C1 H1A . . 116.0 ?
 C2 C1 H1A . . 116.0 ?
 C1 C2 C3 . . 110.73(14) ?
 C1 C2 H2A . . 109.5 ?
 C3 C2 H2A . . 109.5 ?
 C1 C2 H2B . . 109.5 ?
 C3 C2 H2B . . 109.5 ?
 H2A C2 H2B . . 108.1 ?
 C4 C3 C2 . . 108.68(14) ?
 C4 C3 H3A . . 110.0 ?
 C2 C3 H3A . . 110.0 ?
 C4 C3 H3B . . 110.0 ?
 C2 C3 H3B . . 110.0 ?
 H3A C3 H3B . . 108.3 ?
 O1 C4 C5 . . 59.08(10) ?
 O1 C4 C15 . . 112.05(15) ?
 C5 C4 C15 . . 121.46(15) ?
 O1 C4 C3 . . 118.08(14) ?
 C5 C4 C3 . . 116.40(15) ?
 C15 C4 C3 . . 116.73(15) ?
 O1 C5 C4 . . 59.97(10) ?
 O1 C5 C6 . . 120.41(14) ?
 C4 C5 C6 . . 122.16(14) ?
 O1 C5 H5A . . 114.5 ?
 C4 C5 H5A . . 114.5 ?
 C6 C5 H5A . . 114.5 ?
 O2 C6 C5 . . 109.48(12) ?
 O2 C6 C7 . . 106.97(12) ?
 C5 C6 C7 . . 112.07(13) ?
 O2 C6 H6A . . 109.4 ?
 C5 C6 H6A . . 109.4 ?
 C7 C6 H6A . . 109.4 ?
 C11 C7 C8 . . 115.01(13) ?
 C11 C7 C6 . . 102.45(13) ?
 C8 C7 C6 . . 115.15(13) ?
 C11 C7 H7A . . 107.9 ?
 C8 C7 H7A . . 107.9 ?
 C6 C7 H7A . . 107.9 ?
 C7 C8 C9 . . 112.99(13) ?
 C7 C8 H8A . . 109.0 ?
 C9 C8 H8A . . 109.0 ?
 C7 C8 H8B . . 109.0 ?
 C9 C8 H8B . . 109.0 ?
 H8A C8 H8B . . 107.8 ?
 C10 C9 C8 . . 113.70(14) ?
 C10 C9 H9A . . 108.8 ?
 C8 C9 H9A . . 108.8 ?
 C10 C9 H9B . . 108.8 ?
 C8 C9 H9B . . 108.8 ?
 H9A C9 H9B . . 107.7 ?
 C1 C10 C14 . . 124.58(16) ?
 C1 C10 C9 . . 121.22(16) ?
 C14 C10 C9 . . 114.20(15) ?
 C13 C11 C12 . . 119.20(15) ?
 C13 C11 C7 . . 132.19(16) ?
 C12 C11 C7 . . 108.42(13) ?
 O3 C12 O2 . . 121.43(16) ?
 O3 C12 C11 . . 128.78(16) ?
 O2 C12 C11 . . 109.75(13) ?
 C11 C13 C16 . . 127.89(16) ?
 C11 C13 H13A . . 116.1 ?
 C16 C13 H13A . . 116.1 ?
 C10 C14 H14A . . 109.5 ?
 C10 C14 H14B . . 109.5 ?
 H14A C14 H14B . . 109.5 ?
 C10 C14 H14C . . 109.5 ?
 H14A C14 H14C . . 109.5 ?
 H14B C14 H14C . . 109.5 ?
 C4 C15 H15A . . 109.5 ?
 C4 C15 H15B . . 109.5 ?
 H15A C15 H15B . . 109.5 ?
 C4 C15 H15C . . 109.5 ?
 H15A C15 H15C . . 109.5 ?
 H15B C15 H15C . . 109.5 ?
 C17 C16 C21 . . 115.11(16) ?
 C17 C16 C13 . . 124.52(15) ?
 C21 C16 C13 . . 120.31(15) ?
 N18 C17 C16 . . 123.19(16) ?
 N18 C17 H17A . . 118.4 ?
 C16 C17 H17A . . 118.4 ?
 C19 N18 C17 . . 115.52(17) ?
 N20 C19 N18 . . 127.34(18) ?
 N20 C19 H19A . . 116.3 ?
 N18 C19 H19A . . 116.3 ?
 C19 N20 C21 . . 115.48(15) ?
 N20 C21 C16 . . 123.23(17) ?
 N20 C21 H21A . . 118.4 ?
 C16 C21 H21A . . 118.4 ?
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_site_symmetry_1
 _geom_torsion_site_symmetry_2
 _geom_torsion_site_symmetry_3
 _geom_torsion_site_symmetry_4
 _geom_torsion
 _geom_torsion_publ_flag
 C10 C1 C2 C3 . . . . -110.99(19) ?
 C1 C2 C3 C4 . . . . 53.54(19) ?
 C5 O1 C4 C15 . . . . -114.44(16) ?
 C5 O1 C4 C3 . . . . 105.54(17) ?
 C2 C3 C4 O1 . . . . -152.28(15) ?
 C2 C3 C4 C5 . . . . -84.95(18) ?
 C2 C3 C4 C15 . . . . 69.54(18) ?
 C4 O1 C5 C6 . . . . 111.94(17) ?
 C15 C4 C5 O1 . . . . 98.43(17) ?
 C3 C4 C5 O1 . . . . -108.37(16) ?
 O1 C4 C5 C6 . . . . -109.10(17) ?
 C15 C4 C5 C6 . . . . -10.7(2) ?
 C3 C4 C5 C6 . . . . 142.53(15) ?
 C12 O2 C6 C5 . . . . 132.85(14) ?
 C12 O2 C6 C7 . . . . 11.21(17) ?
 O1 C5 C6 O2 . . . . 36.7(2) ?
 C4 C5 C6 O2 . . . . 108.24(17) ?
 O1 C5 C6 C7 . . . . 155.20(14) ?
 C4 C5 C6 C7 . . . . -133.25(15) ?
 O2 C6 C7 C11 . . . . -8.19(16) ?
 C5 C6 C7 C11 . . . . -128.18(14) ?
 O2 C6 C7 C8 . . . . -133.78(14) ?
 C5 C6 C7 C8 . . . . 106.23(15) ?
 C11 C7 C8 C9 . . . . 153.12(15) ?
 C6 C7 C8 C9 . . . . -88.08(18) ?
 C7 C8 C9 C10 . . . . 69.71(19) ?
 C2 C1 C10 C14 . . . . -8.9(3) ?
 C2 C1 C10 C9 . . . . 171.47(16) ?
 C8 C9 C10 C1 . . . . -107.23(18) ?
 C8 C9 C10 C14 . . . . 73.07(19) ?
 C8 C7 C11 C13 . . . . -56.5(2) ?
 C6 C7 C11 C13 . . . . 177.78(17) ?
 C8 C7 C11 C12 . . . . 128.73(15) ?
 C6 C7 C11 C12 . . . . 3.06(16) ?
 C6 O2 C12 O3 . . . . 172.90(16) ?
 C6 O2 C12 C11 . . . . -9.33(18) ?
 C13 C11 C12 O3 . . . . 5.6(3) ?
 C7 C11 C12 O3 . . . . -178.86(18) ?
 C13 C11 C12 O2 . . . . -171.94(15) ?
 C7 C11 C12 O2 . . . . 3.59(18) ?
 C12 C11 C13 C16 . . . . 172.57(15) ?
 C7 C11 C13 C16 . . . . -1.7(3) ?
 C11 C13 C16 C17 . . . . -29.8(3) ?
 C11 C13 C16 C21 . . . . 153.17(17) ?
 C21 C16 C17 N18 . . . . -3.7(3) ?
 C13 C16 C17 N18 . . . . 179.10(17) ?
 C16 C17 N18 C19 . . . . 1.1(3) ?
 C17 N18 C19 N20 . . . . 1.7(3) ?
 N18 C19 N20 C21 . . . . -1.4(3) ?
 C19 N20 C21 C16 . . . . -1.7(3) ?
 C17 C16 C21 N20 . . . . 4.0(2) ?
 C13 C16 C21 N20 . . . . -178.66(16) ?

data_global
_journal_data_validation_number     ?
_journal_date_recd_electronic     2015-10-02
_journal_date_accepted     2015-11-12
_journal_name_full     'Acta Crystallographica, Section E'
_journal_year     2015
_journal_volume     71
_journal_issue     12
_journal_page_first     1536
_journal_page_last     1538
_journal_paper_category     GO
_journal_paper_doi     10.1107/S2056989015021507
_journal_coeditor_code     ZS2350
_publ_contact_author_name
;
Dr P. A. Crooks
;
_publ_contact_author_address
;
Dept. of Pharm. Sciences
College of Pharmacy
University of Arkansas for Medical Sciences
Little Rock, AR 72205
USA
;
_publ_contact_author_email     'pacrooks@uams.edu'
_publ_contact_author_fax
;
501 686 6057
;
_publ_contact_author_phone
;
501 686 6495
;

loop_
    _publ_author_name
    _publ_author_footnote
    _publ_author_address
    'Bommagani, Shobanbabu' .
;
Dept. of Pharm. Sciences
College of Pharmacy
University of Arkansas for Medical Sciences
Little Rock, AR 72205
USA
;
    'Penthala, Narsimha  R.' .
;
Dept. of Pharm. Sciences
College of Pharmacy
University of Arkansas for Medical Sciences
Little Rock, AR 72205
USA
;
    'Parkin, Sean' .
;
Dept. of Chemistry
University of Kentucky
Lexington KY 40506
USA
;
    'Crooks, Peter A.' .
;
Dept. of Pharm. Sciences
College of Pharmacy
University of Arkansas for Medical Sciences
Little Rock, AR 72205
USA
;

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