data_2000821 _journal_name_full 'Acta Cryst.' _journal_year 1992 _journal_volume C48 _journal_page_first 1041 _journal_page_last 1043 loop_ _publ_author_name 'Bocelli, G.' 'Cantoni, A.' 'Tosi, G.' _chemical_formula_sum 'C18 H22 N4' _chemical_formula_weight 294.40 _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M 'P 1 21/c 1' _symmetry_space_group_name_Hall '-P 2ybc' _cell_length_a 13.490(3) _cell_length_b 7.734(2) _cell_length_c 8.211(3) _cell_angle_alpha 90. _cell_angle_beta 97.60(4) _cell_angle_gamma 90. _cell_volume 849.6(4) _cell_formula_units_Z 2 _exptl_crystal_density_diffrn 1.15 _exptl_crystal_density_meas ? _exptl_crystal_F_000 316 _exptl_absorpt_coefficient_mu 0.066 _diffrn_radiation_type Mo _diffrn_radiation_wavelength 0.71069 loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv N1 .2881(2) .0606(5) .0359(4) .0508(11) N2 .3804(2) -.0296(4) .0496(4) .0493(12) C1 .2296(2) .0056(5) .1544(5) .0465(12) C2 .1273(3) .0446(6) .1384(6) .0631(17) C3 .0718(4) -.0003(8) .2604(7) .077(2) C4 .1144(4) -.0797(9) .3999(9) .084(3) C5 .2149(4) -.1179(6) .4195(7) .068(2) C6 .2721(3) -.0738(6) .2990(5) .0527(14) C7 .2375(4) .0899(9) -.1293(7) .071(2) C8 .4531(3) .0507(5) -.0049(5) .0464(14) C9 .4524(4) .2327(7) -.0683(8) .0707(19) H2 .096(3) .102(6) .031(6) .080(14) H3 .009(4) .037(6) .256(6) .091(16) H4 .085(4) -.124(6) .468(6) .077(17) H5 .254(4) -.161(6) .521(6) .068(14) H6 .339(4) -.114(6) .294(6) .073(14) H71 .276(3) .107(5) -.192(6) .053(14) H72 .193(4) .206(9) -.121(7) .112(19) H73 .184(5) -.004(8) -.149(7) .12(2) H91 .450(4) .233(6) -.195(6) .085(16) H92 .395(4) .299(6) -.013(6) .096(15) H93 .516(4) .293(7) -.056(7) .108(18)