A kind of polysubstituted benzene, 3-amino-5,6-dimethyl-2-nitrobiphenyl-4-carbonitrile(C₁₅H₁₃N₃O₂), was synthesized and its crystal structure was determined. The molecule is composed of two phenyl moieties, two methyl groups, a cyano group, an amino group and a nitro group. The methyl groups, cyano group and amino group are nearly coplanar with the connected benzene ring. Because of the large volume, the nitro group and the connected benzene ring are twisted. The dihedral angle between the two benzene rings is 83.51°. In the crystal, molecules are linked by N—H···N and C—H···O hydrogen bonds.