# Electronic Supplementary Material (ESI) for Organic & Biomolecular Chemistry.
# 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. 
# 
#######################################################################

data_mz048
_database_code_depnum_ccdc_archive 'CCDC 1400648'
_audit_update_record             
;
2015-05-12 deposited with the CCDC.
2015-09-07 downloaded from the CCDC.
;

_audit_creation_method           SHELXL-2014/7
_shelx_SHELXL_version_number     2014/7
_chemical_name_systematic        
'(1 R,3a S,4 S,7 R,7a R)-2-benzoyl-N-(tert-butyl)-2,3,3a,4,7,7a-hexahydro-1H-4,7-epoxyisoindole-1-carboxamide'
_chemical_name_common            ?
_chemical_melting_point          450.0-458.5
_chemical_formula_moiety         'C20 H24 N2 O3'
_chemical_formula_sum            'C20 H24 N2 O3'
_chemical_formula_weight         340.41

loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0192 0.0096 '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 0.0330 0.0189 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0517 0.0336 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_H-M_alt        'P 21/c'
_space_group_name_Hall           '-P 2ybc'

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

_cell_length_a                   9.0781(3)
_cell_length_b                   15.5615(6)
_cell_length_c                   12.3439(5)
_cell_angle_alpha                90
_cell_angle_beta                 95.1190(10)
_cell_angle_gamma                90
_cell_volume                     1736.85(11)
_cell_formula_units_Z            4
_cell_measurement_temperature    100(2)
_cell_measurement_reflns_used    9845
_cell_measurement_theta_min      4.58
_cell_measurement_theta_max      66.65

_exptl_crystal_description       block
_exptl_crystal_colour            colourless
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_F_000             728
_exptl_transmission_factor_min   ?
_exptl_transmission_factor_max   ?
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_exptl_absorpt_coefficient_mu    0.707
_shelx_estimated_absorpt_T_min   ?
_shelx_estimated_absorpt_T_max   ?
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_correction_T_min  0.6982
_exptl_absorpt_correction_T_max  0.7528
_exptl_absorpt_process_details   'SADABS 2008/1'
_exptl_absorpt_special_details   ?
_diffrn_ambient_temperature      100(2)
_diffrn_radiation_wavelength     1.54184
_diffrn_radiation_type           CuK\a
_diffrn_source                   'Incoatec Cu microsource'
_diffrn_measurement_device_type  'Bruker Prospector with APEX II'
_diffrn_measurement_method       'ω scans'
_diffrn_reflns_number            25514
_diffrn_reflns_av_unetI/netI     0.0134
_diffrn_reflns_av_R_equivalents  0.0215
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_theta_min         4.584
_diffrn_reflns_theta_max         66.739
_diffrn_reflns_theta_full        66.739
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measured_fraction_theta_full 0.987
_diffrn_reflns_Laue_measured_fraction_max 0.987
_diffrn_reflns_Laue_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_point_group_measured_fraction_full 0.987
_reflns_number_total             3045
_reflns_number_gt                2952
_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 Saint v8.34A'
_computing_cell_refinement       'Bruker Saint v8.34A'
_computing_data_reduction        'Bruker Saint v8.34A'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_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)+(0.0342P)²+0.9332P] where P=(Fo²+2Fc²)/3'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   'fourier maps'
_atom_sites_solution_hydrogens   geom
_refine_ls_hydrogen_treatment    constr
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014)'
_refine_ls_extinction_coef       0.0028(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_number_reflns         3045
_refine_ls_number_parameters     230
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0338
_refine_ls_R_factor_gt           0.0330
_refine_ls_wR_factor_ref         0.0817
_refine_ls_wR_factor_gt          0.0809
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_restrained_S_all      1.060
_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
O18 O 0.24308(10) 0.48039(6) 0.24892(7) 0.0221(2) Uani 1 1 d . . . . .
N1 N 0.47147(10) 0.59384(6) 0.29579(7) 0.0135(2) Uani 1 1 d . . . . .
C2 C 0.37278(12) 0.57357(7) 0.37982(9) 0.0133(2) Uani 1 1 d . . . . .
H2 H 0.4299 0.5642 0.4500 0.016 Uiso 1 1 calc R U . . .
C3 C 0.27153(12) 0.65288(7) 0.38552(9) 0.0139(2) Uani 1 1 d . . . . .
H3 H 0.1667 0.6373 0.3829 0.017 Uiso 1 1 calc R U . . .
C8 C 0.30606(13) 0.71212(8) 0.28900(9) 0.0158(3) Uani 1 1 d . . . . .
H8 H 0.2153 0.7292 0.2453 0.019 Uiso 1 1 calc R U . . .
C7 C 0.37867(14) 0.79004(8) 0.35255(10) 0.0208(3) Uani 1 1 d . . . . .
H7 H 0.4421 0.8261 0.3111 0.025 Uiso 1 1 calc R U . . .
C6 C 0.25333(14) 0.83701(8) 0.40087(10) 0.0208(3) Uani 1 1 d . . . . .
H6 H 0.2115 0.8894 0.3786 0.025 Uiso 1 1 calc R U . . .
C4 C 0.32068(13) 0.71125(8) 0.48410(9) 0.0173(3) Uani 1 1 d . . . . .
H4 H 0.3349 0.6816 0.5543 0.021 Uiso 1 1 calc R U . . .
C5 C 0.21638(13) 0.78772(8) 0.48119(10) 0.0189(3) Uani 1 1 d . . . . .
H5 H 0.1418 0.7977 0.5266 0.023 Uiso 1 1 calc R U . . .
C17 C 0.28331(12) 0.49286(7) 0.34528(9) 0.0140(2) Uani 1 1 d . . . . .
C9 C 0.40774(13) 0.66033(8) 0.22180(10) 0.0184(3) Uani 1 1 d . . . . .
H9A H 0.3522 0.6347 0.1592 0.022 Uiso 1 1 calc R U . . .
H9B H 0.4847 0.6966 0.1967 0.022 Uiso 1 1 calc R U . . .
C20 C 0.17153(13) 0.35924(7) 0.41527(10) 0.0166(3) Uani 1 1 d . . . . .
O10 O 0.45243(9) 0.74897(6) 0.44722(7) 0.0215(2) Uani 1 1 d . . . . .
C11 C 0.59298(12) 0.54581(7) 0.28645(9) 0.0132(2) Uani 1 1 d . . . . .
O12 O 0.63331(9) 0.49113(5) 0.35634(6) 0.0174(2) Uani 1 1 d . . . . .
C21C C 0.25310(17) 0.29876(9) 0.34351(12) 0.0290(3) Uani 1 1 d . . . . .
H21G H 0.2543 0.3232 0.2722 0.043 Uiso 1 1 calc R U . . .
H21H H 0.2035 0.2442 0.3384 0.043 Uiso 1 1 calc R U . . .
H21I H 0.3528 0.2909 0.3749 0.043 Uiso 1 1 calc R U . . .
C14B C 0.61848(13) 0.56863(7) 0.08527(10) 0.0165(3) Uani 1 1 d . . . . .
H14B H 0.5161 0.5696 0.0715 0.020 Uiso 1 1 calc R U . . .
C15B C 0.70786(14) 0.57602(8) -0.00041(10) 0.0199(3) Uani 1 1 d . . . . .
H15B H 0.6649 0.5810 -0.0714 0.024 Uiso 1 1 calc R U . . .
C21A C 0.01345(14) 0.37552(9) 0.36720(12) 0.0282(3) Uani 1 1 d . . . . .
H21A H 0.0150 0.4016 0.2968 0.042 Uiso 1 1 calc R U . . .
H22B H -0.0351 0.4132 0.4142 0.042 Uiso 1 1 calc R U . . .
H22C H -0.0391 0.3220 0.3603 0.042 Uiso 1 1 calc R U . . .
C21B C 0.17180(14) 0.32088(8) 0.52884(10) 0.0208(3) Uani 1 1 d . . . . .
H21D H 0.1229 0.2661 0.5245 0.031 Uiso 1 1 calc R U . . .
H21E H 0.1207 0.3588 0.5741 0.031 Uiso 1 1 calc R U . . .
H21F H 0.2719 0.3135 0.5595 0.031 Uiso 1 1 calc R U . . .
C13 C 0.68241(13) 0.55978(7) 0.19132(9) 0.0140(2) Uani 1 1 d . . . . .
C14 C 0.83625(13) 0.55710(7) 0.21022(10) 0.0163(3) Uani 1 1 d . . . . .
H14 H 0.8798 0.5490 0.2806 0.020 Uiso 1 1 calc R U . . .
C15 C 0.92487(13) 0.56645(8) 0.12492(10) 0.0195(3) Uani 1 1 d . . . . .
H15 H 1.0273 0.5664 0.1385 0.023 Uiso 1 1 calc R U . . .
C16 C 0.86086(14) 0.57590(8) 0.01995(10) 0.0202(3) Uani 1 1 d . . . . .
H16 H 0.9202 0.5822 -0.0372 0.024 Uiso 1 1 calc R U . . .
N19 N 0.25228(10) 0.44183(6) 0.42761(8) 0.0142(2) Uani 1 1 d . . . . .
H19A H 0.2815 0.4583 0.4925 0.017 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
O18 C17 1.2282(14) . ?
N1 C11 1.3458(15) . ?
N1 C2 1.4643(14) . ?
N1 C9 1.4646(15) . ?
C2 C17 1.5354(16) . ?
C2 C3 1.5442(16) . ?
C2 H2 0.9800 . ?
C3 C4 1.5517(16) . ?
C3 C8 1.5602(15) . ?
C3 H3 0.9800 . ?
C8 C9 1.5252(16) . ?
C8 C7 1.5582(17) . ?
C8 H8 0.9800 . ?
C7 O10 1.4432(15) . ?
C7 C6 1.5185(17) . ?
C7 H7 0.9800 . ?
C6 C5 1.3203(18) . ?
C6 H6 0.9300 . ?
C4 O10 1.4421(14) . ?
C4 C5 1.5191(17) . ?
C4 H4 0.9800 . ?
C5 H5 0.9300 . ?
C17 N19 1.3394(15) . ?
C9 H9A 0.9700 . ?
C9 H9B 0.9700 . ?
C20 N19 1.4807(15) . ?
C20 C21B 1.5236(16) . ?
C20 C21A 1.5243(17) . ?
C20 C21C 1.5283(17) . ?
C11 O12 1.2434(14) . ?
C11 C13 1.5018(15) . ?
C21C H21G 0.9600 . ?
C21C H21H 0.9600 . ?
C21C H21I 0.9600 . ?
C14B C13 1.3906(17) . ?
C14B C15B 1.3940(17) . ?
C14B H14B 0.9300 . ?
C15B C16 1.3893(18) . ?
C15B H15B 0.9300 . ?
C21A H21A 0.9600 . ?
C21A H22B 0.9600 . ?
C21A H22C 0.9600 . ?
C21B H21D 0.9600 . ?
C21B H21E 0.9600 . ?
C21B H21F 0.9600 . ?
C13 C14 1.3959(17) . ?
C14 C15 1.3886(17) . ?
C14 H14 0.9300 . ?
C15 C16 1.3798(18) . ?
C15 H15 0.9300 . ?
C16 H16 0.9300 . ?
N19 H19A 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
C11 N1 C2 119.93(9) . . ?
C11 N1 C9 128.32(10) . . ?
C2 N1 C9 111.18(9) . . ?
N1 C2 C17 108.75(9) . . ?
N1 C2 C3 105.33(9) . . ?
C17 C2 C3 111.36(9) . . ?
N1 C2 H2 110.4 . . ?
C17 C2 H2 110.4 . . ?
C3 C2 H2 110.4 . . ?
C2 C3 C4 111.89(9) . . ?
C2 C3 C8 106.05(9) . . ?
C4 C3 C8 100.93(9) . . ?
C2 C3 H3 112.4 . . ?
C4 C3 H3 112.4 . . ?
C8 C3 H3 112.4 . . ?
C9 C8 C7 115.83(10) . . ?
C9 C8 C3 106.00(9) . . ?
C7 C8 C3 100.38(9) . . ?
C9 C8 H8 111.3 . . ?
C7 C8 H8 111.3 . . ?
C3 C8 H8 111.3 . . ?
O10 C7 C6 101.82(10) . . ?
O10 C7 C8 102.00(9) . . ?
C6 C7 C8 105.92(10) . . ?
O10 C7 H7 115.1 . . ?
C6 C7 H7 115.1 . . ?
C8 C7 H7 115.1 . . ?
C5 C6 C7 105.35(11) . . ?
C5 C6 H6 127.3 . . ?
C7 C6 H6 127.3 . . ?
O10 C4 C5 101.91(9) . . ?
O10 C4 C3 100.33(9) . . ?
C5 C4 C3 107.76(9) . . ?
O10 C4 H4 115.0 . . ?
C5 C4 H4 115.0 . . ?
C3 C4 H4 115.0 . . ?
C6 C5 C4 105.87(11) . . ?
C6 C5 H5 127.1 . . ?
C4 C5 H5 127.1 . . ?
O18 C17 N19 125.22(11) . . ?
O18 C17 C2 120.16(10) . . ?
N19 C17 C2 114.59(10) . . ?
N1 C9 C8 105.00(9) . . ?
N1 C9 H9A 110.7 . . ?
C8 C9 H9A 110.7 . . ?
N1 C9 H9B 110.7 . . ?
C8 C9 H9B 110.7 . . ?
H9A C9 H9B 108.8 . . ?
N19 C20 C21B 106.58(9) . . ?
N19 C20 C21A 109.64(10) . . ?
C21B C20 C21A 110.33(10) . . ?
N19 C20 C21C 109.46(10) . . ?
C21B C20 C21C 109.32(10) . . ?
C21A C20 C21C 111.39(11) . . ?
C4 O10 C7 95.62(8) . . ?
O12 C11 N1 120.90(10) . . ?
O12 C11 C13 119.69(10) . . ?
N1 C11 C13 119.40(10) . . ?
C20 C21C H21G 109.5 . . ?
C20 C21C H21H 109.5 . . ?
H21G C21C H21H 109.5 . . ?
C20 C21C H21I 109.5 . . ?
H21G C21C H21I 109.5 . . ?
H21H C21C H21I 109.5 . . ?
C13 C14B C15B 120.01(11) . . ?
C13 C14B H14B 120.0 . . ?
C15B C14B H14B 120.0 . . ?
C16 C15B C14B 120.18(11) . . ?
C16 C15B H15B 119.9 . . ?
C14B C15B H15B 119.9 . . ?
C20 C21A H21A 109.5 . . ?
C20 C21A H22B 109.5 . . ?
H21A C21A H22B 109.5 . . ?
C20 C21A H22C 109.5 . . ?
H21A C21A H22C 109.5 . . ?
H22B C21A H22C 109.5 . . ?
C20 C21B H21D 109.5 . . ?
C20 C21B H21E 109.5 . . ?
H21D C21B H21E 109.5 . . ?
C20 C21B H21F 109.5 . . ?
H21D C21B H21F 109.5 . . ?
H21E C21B H21F 109.5 . . ?
C14B C13 C14 119.18(11) . . ?
C14B C13 C11 122.76(10) . . ?
C14 C13 C11 117.88(10) . . ?
C15 C14 C13 120.58(11) . . ?
C15 C14 H14 119.7 . . ?
C13 C14 H14 119.7 . . ?
C16 C15 C14 119.95(11) . . ?
C16 C15 H15 120.0 . . ?
C14 C15 H15 120.0 . . ?
C15 C16 C15B 120.04(11) . . ?
C15 C16 H16 120.0 . . ?
C15B C16 H16 120.0 . . ?
C17 N19 C20 124.91(10) . . ?
C17 N19 H19A 117.5 . . ?
C20 N19 H19A 117.5 . . ?

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
C11 N1 C2 C17 -74.36(12) . . . . ?
C9 N1 C2 C17 97.74(11) . . . . ?
C11 N1 C2 C3 166.17(10) . . . . ?
C9 N1 C2 C3 -21.72(12) . . . . ?
N1 C2 C3 C4 -101.58(10) . . . . ?
C17 C2 C3 C4 140.71(10) . . . . ?
N1 C2 C3 C8 7.59(11) . . . . ?
C17 C2 C3 C8 -110.12(10) . . . . ?
C2 C3 C8 C9 7.95(12) . . . . ?
C4 C3 C8 C9 124.74(10) . . . . ?
C2 C3 C8 C7 -112.93(10) . . . . ?
C4 C3 C8 C7 3.86(11) . . . . ?
C9 C8 C7 O10 -80.60(11) . . . . ?
C3 C8 C7 O10 32.98(10) . . . . ?
C9 C8 C7 C6 173.23(10) . . . . ?
C3 C8 C7 C6 -73.19(11) . . . . ?
O10 C7 C6 C5 -33.29(12) . . . . ?
C8 C7 C6 C5 73.00(12) . . . . ?
C2 C3 C4 O10 72.82(11) . . . . ?
C8 C3 C4 O10 -39.59(10) . . . . ?
C2 C3 C4 C5 178.99(9) . . . . ?
C8 C3 C4 C5 66.59(11) . . . . ?
C7 C6 C5 C4 1.12(13) . . . . ?
O10 C4 C5 C6 31.39(12) . . . . ?
C3 C4 C5 C6 -73.67(12) . . . . ?
N1 C2 C17 O18 -35.60(14) . . . . ?
C3 C2 C17 O18 80.03(13) . . . . ?
N1 C2 C17 N19 146.13(10) . . . . ?
C3 C2 C17 N19 -98.24(11) . . . . ?
C11 N1 C9 C8 -161.82(11) . . . . ?
C2 N1 C9 C8 26.90(12) . . . . ?
C7 C8 C9 N1 89.82(12) . . . . ?
C3 C8 C9 N1 -20.48(12) . . . . ?
C5 C4 O10 C7 -49.73(10) . . . . ?
C3 C4 O10 C7 61.08(10) . . . . ?
C6 C7 O10 C4 50.49(10) . . . . ?
C8 C7 O10 C4 -58.84(10) . . . . ?
C2 N1 C11 O12 -9.09(16) . . . . ?
C9 N1 C11 O12 -179.69(11) . . . . ?
C2 N1 C11 C13 172.07(9) . . . . ?
C9 N1 C11 C13 1.46(17) . . . . ?
C13 C14B C15B C16 -1.00(18) . . . . ?
C15B C14B C13 C14 -0.98(17) . . . . ?
C15B C14B C13 C11 -175.94(11) . . . . ?
O12 C11 C13 C14B 135.97(12) . . . . ?
N1 C11 C13 C14B -45.18(16) . . . . ?
O12 C11 C13 C14 -39.06(15) . . . . ?
N1 C11 C13 C14 139.80(11) . . . . ?
C14B C13 C14 C15 2.47(17) . . . . ?
C11 C13 C14 C15 177.67(10) . . . . ?
C13 C14 C15 C16 -1.97(18) . . . . ?
C14 C15 C16 C15B -0.03(18) . . . . ?
C14B C15B C16 C15 1.51(18) . . . . ?
O18 C17 N19 C20 3.73(18) . . . . ?
C2 C17 N19 C20 -178.10(10) . . . . ?
C21B C20 N19 C17 176.03(10) . . . . ?
C21A C20 N19 C17 -64.56(14) . . . . ?
C21C C20 N19 C17 57.90(14) . . . . ?

_refine_diff_density_max         0.267
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.037

