1,1'-butane-1,4-diylbis[2-(4-nitrophenyl)hexahydropyrimidine] InChI=1/C24H32N6O4/c31-29(32)21-9-5-19(6-10-21)23-25-13-3-17-27(23)15-1-2-16-28-18-4-14-26-24(28)20-7-11-22(12-8-20)30(33)34/h5-12,23-26H,1-4,13-18H pyrimidine, 1,1'-(1,4-butanediyl)bis[hexahydro-2-(4-nitrophenyl)-