# Supplementary Information (SI) for Chemical Communications.
# This journal is © The Royal Society of Chemistry 2025

####################################################################### 
# 
# 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_bf8_auto
_audit_block_doi                 10.5517/ccdc.csd.cc2l0lz6
_database_code_depnum_ccdc_archive 'CCDC 2383868'
loop_
_audit_author_name
_audit_author_address
'Hydantoinyl Ribose - HR'
;Bar Ilan University
Israel
;
_audit_update_record             
;
2024-09-13 deposited with the CCDC.	2024-12-16 downloaded from the CCDC.
;
_audit_creation_date             2024-07-21
_audit_creation_method           
;
Olex2 1.5
(compiled 2024.01.12 svn.r2f8d729c for OlexSys, GUI svn.r6928)
;
_shelx_SHELXL_version_number     2016/4
_chemical_name_common            ?
_chemical_name_systematic        ?
_chemical_formula_moiety         'C8 H12 N2 O6'
_chemical_formula_sum            'C8 H12 N2 O6'
_chemical_formula_weight         232.20
_chemical_absolute_configuration ad
_chemical_melting_point          ?
_chemical_oxdiff_formula         C8O6N2H4
_chemical_oxdiff_usercomment     'Odai Bsoul  Bilha Fischer BIU'
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'

_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      orthorhombic
_space_group_IT_number           19
_space_group_name_H-M_alt        'P 21 21 21'
_space_group_name_Hall           'P 2ac 2ab'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x+1/2, -y, z+1/2'
'-x, y+1/2, -z+1/2'
'x+1/2, -y+1/2, -z'

_cell_length_a                   9.08590(10)
_cell_length_b                   9.16110(10)
_cell_length_c                   11.4717(2)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     954.87(2)
_cell_formula_units_Z            4
_cell_measurement_reflns_used    8528
_cell_measurement_temperature    ?
_cell_measurement_theta_max      74.4010
_cell_measurement_theta_min      4.8570
_shelx_estimated_absorpt_T_max   ?
_shelx_estimated_absorpt_T_min   ?
_exptl_absorpt_coefficient_mu    1.214
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.82623
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   
;
CrysAlisPro 1.171.43.108a (Rigaku Oxford Diffraction, 2024)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_absorpt_special_details   ?
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.615
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_exptl_crystal_description       prism
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_exptl_transmission_factor_max   ?
_exptl_transmission_factor_min   ?
_diffrn_reflns_av_R_equivalents  0.0181
_diffrn_reflns_av_unetI/netI     0.0115
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10131
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.974
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         74.672
_diffrn_reflns_theta_min         6.182
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      ?
_diffrn_detector                 'Hybrid Pixel Array Detector'
_diffrn_detector_area_resol_mean ?
_diffrn_detector_type            'HyPix-Arc 150'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_details      
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  tₑₓₚ   ω     θ     κ     φ   Frames
#--------------------------------------------------------------------------
  1  ω   -110.00 -85.00   0.50    0.05    --  -70.00 -55.00 116.01   50
  2  ω   -109.00 -84.00   0.50    0.05    --  -74.00 -72.00  -2.04   50
  3  ω   -102.00 -77.00   0.50    0.05    --  -70.00 -75.00 -81.64   50
  4  ω   -113.00 -88.00   0.50    0.05    --  -68.75 -22.00 -60.00   50
  5  ω   -109.00 -81.00   0.50    0.05    --  -65.92 -22.00 -60.00   56
  6  ω    -78.00 -53.00   0.50    0.05    --  -65.92 109.00 -70.00   50
  7  ω    -82.00 -36.00   0.50    0.05    --  -68.75 109.00 -70.00   92
  8  ω    -83.00 -57.00   0.50    0.05    --  -68.75 114.00-165.00   52
  9  ω    -58.00 -32.00   0.50    0.05    --  -65.92 114.00-165.00   52
 10  ω     49.00  77.00   0.50    0.05    --   38.00  63.00 -92.63   56
 11  ω     62.00  88.00   0.50    0.05    --   46.00  54.00-136.97   52
 12  ω     81.00 123.00   0.50    0.05    --   77.50  26.00-146.21   84
 13  ω     95.00 121.00   0.50    0.05    --   77.50  38.00-132.25   52
 14  ω     89.00 114.00   0.50    0.05    --   77.50  65.00 -53.94   50
 15  ω     58.00 116.00   0.50    0.05    --   77.37  15.00  60.00  116
 16  ω     70.00 103.00   0.50    0.05    --   77.37  22.00 105.00   66
 17  ω     65.00  90.00   0.50    0.05    --   73.12  22.00 105.00   50
 18  ω     51.00  77.00   0.50    0.05    --   38.00  55.00 150.09   52
 19  ω     54.00  79.00   0.50    0.05    --   65.58  22.00 105.00   50
 20  ω     58.00  96.00   0.50    0.05    --   77.50   8.00   4.02   76
 21  ω     60.00 109.00   0.50    0.05    --   77.37   0.00 -60.00   98
 22  ω     59.00 108.00   0.50    0.05    --   77.37   0.00-120.00   98
 23  ω     43.00  88.00   0.50    0.05    --   77.37   0.00-180.00   90
 24  ω     30.00  55.00   0.50    0.05    --   65.58-109.00-166.00   50
 25  ω     67.00  92.00   0.50    0.05    --   77.37-125.00-150.00   50
 26  ω     41.00  93.00   0.50    0.05    --   77.37-125.00 -60.00  104
 27  ω     74.00 100.00   0.50    0.05    --   77.37-125.00 -30.00   52
 28  ω     42.00  68.00   0.50    0.05    --   77.37-125.00   0.00   52
 29  ω     39.00  64.00   0.50    0.05    --   77.37-125.00 -30.00   50
 30  ω     43.00  95.00   0.50    0.05    --   77.37-125.00-120.00  104
 31  ω     40.00  98.00   0.50    0.05    --   77.37-125.00  30.00  116
 32  ω     64.00  94.00   0.50    0.05    --   77.37-114.00 103.00   60
 33  ω     36.00  63.00   0.50    0.05    --   73.12-114.00 103.00   54
 34  ω     41.00  67.00   0.50    0.05    --   77.37-125.00 150.00   52
 35  ω     28.00  53.00   0.50    0.05    --   65.58-114.00 103.00   50
 36  ω     42.00  67.00   0.50    0.05    --   77.37-109.00-166.00   50
 37  ω     58.00  87.00   0.50    0.05    --   73.12-109.00-166.00   58
 38  ω   -107.00 -82.00   0.50    0.05    --  -74.00 -83.00 113.07   50
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB Synergy R, HyPix-Arc 150'
_diffrn_measurement_method       'ω scans'
_diffrn_orient_matrix_type       
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0438541000
_diffrn_orient_matrix_UB_12      -0.1420937000
_diffrn_orient_matrix_UB_13      -0.0628532000
_diffrn_orient_matrix_UB_21      -0.0182786000
_diffrn_orient_matrix_UB_22      0.0853027000
_diffrn_orient_matrix_UB_23      -0.1148406000
_diffrn_orient_matrix_UB_31      0.1627586000
_diffrn_orient_matrix_UB_32      -0.0286621000
_diffrn_orient_matrix_UB_33      -0.0298362000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           ?
_diffrn_radiation_wavelength     1.54184
_diffrn_source                   'Rotating-anode X-ray tube'
_diffrn_source_type              'PhotonJet R (Cu) X-ray Source'
_reflns_Friedel_coverage         0.683
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.959
_reflns_number_gt                1891
_reflns_number_total             1910
_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       'CrysAlisPro 1.171.43.108a (Rigaku OD, 2024)'
_computing_data_collection       'CrysAlisPro 1.171.43.108a (Rigaku OD, 2024)'
_computing_data_reduction        'CrysAlisPro 1.171.43.108a (Rigaku OD, 2024)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2016/4 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_refine_diff_density_max         0.165
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details 
;
 Flack x determined using 764 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.06(5)
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     148
_refine_ls_number_reflns         1910
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0245
_refine_ls_R_factor_gt           0.0243
_refine_ls_restrained_S_all      1.061
_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)+(0.0351P)²+0.2630P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0629
_refine_ls_wR_factor_ref         0.0631
_refine_special_details          ?
_olex2_refinement_description    
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All N(H) groups
 At 1.5 times of:
  All O(H) groups
2.a Ternary CH refined with riding coordinates:
 C1(H1), C3(H3A), C4(H4A), C5(H5)
2.b Secondary CH2 refined with riding coordinates:
 C2(H2B,H2C), C8(H8A,H8B)
2.c Aromatic/amide H refined with riding coordinates:
 N2(H2A)
2.d Idealised tetrahedral OH refined as rotating group:
 O2(H2), O3(H3), O4(H4)
;
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_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
O1 O 0.74341(13) 0.55867(12) 0.53673(10) 0.0155(3) Uani 1 1 d . . . . .
O2 O 0.62214(15) 0.27336(13) 0.42888(11) 0.0224(3) Uani 1 1 d . . . . .
H2 H 0.612142 0.332734 0.373643 0.034 Uiso 1 1 calc R U . . .
O3 O 0.61488(15) 0.41582(14) 0.77714(10) 0.0221(3) Uani 1 1 d . . . . .
H3 H 0.618393 0.332489 0.807560 0.033 Uiso 1 1 calc R U . . .
O4 O 0.39949(14) 0.59583(13) 0.68728(11) 0.0195(3) Uani 1 1 d . . . . .
H4 H 0.392036 0.543465 0.747094 0.029 Uiso 1 1 calc R U . . .
O5 O 0.69670(13) 0.95371(13) 0.61011(11) 0.0165(3) Uani 1 1 d . . . . .
O6 O 0.48240(14) 0.92969(13) 0.25077(11) 0.0192(3) Uani 1 1 d . . . . .
N1 N 0.59052(16) 0.75982(15) 0.51051(12) 0.0145(3) Uani 1 1 d . . . . .
N2 N 0.58868(16) 0.97804(15) 0.42776(12) 0.0147(3) Uani 1 1 d . . . . .
H2A H 0.598454 1.073074 0.419689 0.018 Uiso 1 1 calc R U . . .
C1 C 0.73725(18) 0.41293(17) 0.58650(14) 0.0150(3) Uani 1 1 d . . . . .
H1 H 0.820828 0.401678 0.642503 0.018 Uiso 1 1 calc R U . . .
C2 C 0.7565(2) 0.30323(18) 0.48918(16) 0.0198(4) Uani 1 1 d . . . . .
H2B H 0.829855 0.341023 0.432946 0.024 Uiso 1 1 calc R U . . .
H2C H 0.795456 0.211094 0.522079 0.024 Uiso 1 1 calc R U . . .
C3 C 0.59160(19) 0.40189(18) 0.65493(14) 0.0159(3) Uani 1 1 d . . . . .
H3A H 0.538031 0.309534 0.635962 0.019 Uiso 1 1 calc R U . . .
C4 C 0.50673(18) 0.53579(18) 0.61182(14) 0.0147(3) Uani 1 1 d . . . . .
H4A H 0.458552 0.510959 0.535990 0.018 Uiso 1 1 calc R U . . .
C5 C 0.63036(18) 0.64449(18) 0.58861(15) 0.0145(3) Uani 1 1 d . . . . .
H5 H 0.666087 0.686435 0.663952 0.017 Uiso 1 1 calc R U . . .
C6 C 0.63227(17) 0.90159(18) 0.52612(14) 0.0135(3) Uani 1 1 d . . . . .
C7 C 0.52923(18) 0.88974(18) 0.34534(15) 0.0146(3) Uani 1 1 d . . . . .
C8 C 0.53215(19) 0.73624(18) 0.39343(15) 0.0155(3) Uani 1 1 d . . . . .
H8A H 0.432246 0.693228 0.395949 0.019 Uiso 1 1 calc R U . . .
H8B H 0.597494 0.672260 0.346966 0.019 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
O1 C1 1.4531(18) . ?
O1 C5 1.424(2) . ?
O2 H2 0.8400 . ?
O2 C2 1.430(2) . ?
O3 H3 0.8400 . ?
O3 C3 1.424(2) . ?
O4 H4 0.8400 . ?
O4 C4 1.415(2) . ?
O5 C6 1.224(2) . ?
O6 C7 1.221(2) . ?
N1 C5 1.432(2) . ?
N1 C6 1.365(2) . ?
N1 C8 1.460(2) . ?
N2 H2A 0.8800 . ?
N2 C6 1.386(2) . ?
N2 C7 1.357(2) . ?
C1 H1 1.0000 . ?
C1 C2 1.512(2) . ?
C1 C3 1.542(2) . ?
C2 H2B 0.9900 . ?
C2 H2C 0.9900 . ?
C3 H3A 1.0000 . ?
C3 C4 1.531(2) . ?
C4 H4A 1.0000 . ?
C4 C5 1.525(2) . ?
C5 H5 1.0000 . ?
C7 C8 1.511(2) . ?
C8 H8A 0.9900 . ?
C8 H8B 0.9900 . ?

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
C5 O1 C1 108.38(12) . . ?
C2 O2 H2 109.5 . . ?
C3 O3 H3 109.5 . . ?
C4 O4 H4 109.5 . . ?
C5 N1 C8 123.94(14) . . ?
C6 N1 C5 123.36(14) . . ?
C6 N1 C8 111.24(14) . . ?
C6 N2 H2A 123.8 . . ?
C7 N2 H2A 123.8 . . ?
C7 N2 C6 112.33(14) . . ?
O1 C1 H1 108.5 . . ?
O1 C1 C2 108.43(13) . . ?
O1 C1 C3 107.06(12) . . ?
C2 C1 H1 108.5 . . ?
C2 C1 C3 115.56(15) . . ?
C3 C1 H1 108.5 . . ?
O2 C2 C1 112.68(15) . . ?
O2 C2 H2B 109.1 . . ?
O2 C2 H2C 109.1 . . ?
C1 C2 H2B 109.1 . . ?
C1 C2 H2C 109.1 . . ?
H2B C2 H2C 107.8 . . ?
O3 C3 C1 111.59(14) . . ?
O3 C3 H3A 111.3 . . ?
O3 C3 C4 108.73(13) . . ?
C1 C3 H3A 111.3 . . ?
C4 C3 C1 102.43(13) . . ?
C4 C3 H3A 111.3 . . ?
O4 C4 C3 117.44(13) . . ?
O4 C4 H4A 108.6 . . ?
O4 C4 C5 111.12(13) . . ?
C3 C4 H4A 108.6 . . ?
C5 C4 C3 102.04(13) . . ?
C5 C4 H4A 108.6 . . ?
O1 C5 N1 109.16(13) . . ?
O1 C5 C4 104.11(13) . . ?
O1 C5 H5 109.8 . . ?
N1 C5 C4 113.89(14) . . ?
N1 C5 H5 109.8 . . ?
C4 C5 H5 109.8 . . ?
O5 C6 N1 127.39(15) . . ?
O5 C6 N2 125.47(15) . . ?
N1 C6 N2 107.14(14) . . ?
O6 C7 N2 125.39(16) . . ?
O6 C7 C8 127.54(15) . . ?
N2 C7 C8 107.07(14) . . ?
N1 C8 C7 101.81(13) . . ?
N1 C8 H8A 111.4 . . ?
N1 C8 H8B 111.4 . . ?
C7 C8 H8A 111.4 . . ?
C7 C8 H8B 111.4 . . ?
H8A C8 H8B 109.3 . . ?

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
O1 C1 C2 O2 -83.23(17) . . . . ?
O1 C1 C3 O3 -102.40(15) . . . . ?
O1 C1 C3 C4 13.76(16) . . . . ?
O3 C3 C4 O4 -35.6(2) . . . . ?
O3 C3 C4 C5 86.09(15) . . . . ?
O4 C4 C5 O1 166.44(13) . . . . ?
O4 C4 C5 N1 -74.77(17) . . . . ?
O6 C7 C8 N1 -176.35(17) . . . . ?
N2 C7 C8 N1 3.40(17) . . . . ?
C1 O1 C5 N1 -154.73(13) . . . . ?
C1 O1 C5 C4 -32.76(16) . . . . ?
C1 C3 C4 O4 -153.83(14) . . . . ?
C1 C3 C4 C5 -32.11(15) . . . . ?
C2 C1 C3 O3 136.72(15) . . . . ?
C2 C1 C3 C4 -107.12(15) . . . . ?
C3 C1 C2 O2 36.9(2) . . . . ?
C3 C4 C5 O1 40.47(15) . . . . ?
C3 C4 C5 N1 159.25(13) . . . . ?
C5 O1 C1 C2 137.08(14) . . . . ?
C5 O1 C1 C3 11.77(16) . . . . ?
C5 N1 C6 O5 -6.5(3) . . . . ?
C5 N1 C6 N2 173.24(14) . . . . ?
C5 N1 C8 C7 -172.72(15) . . . . ?
C6 N1 C5 O1 -104.63(17) . . . . ?
C6 N1 C5 C4 139.51(16) . . . . ?
C6 N1 C8 C7 -6.13(18) . . . . ?
C6 N2 C7 O6 -179.94(16) . . . . ?
C6 N2 C7 C8 0.30(18) . . . . ?
C7 N2 C6 O5 175.48(16) . . . . ?
C7 N2 C6 N1 -4.23(19) . . . . ?
C8 N1 C5 O1 60.4(2) . . . . ?
C8 N1 C5 C4 -55.5(2) . . . . ?
C8 N1 C6 O5 -173.13(16) . . . . ?
C8 N1 C6 N2 6.56(19) . . . . ?

_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details 
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.255
_oxdiff_exptl_absorpt_empirical_full_min 0.775
