title: 6-Amino-3-methyl-4-(4-nitro-phen-yl)-1-phenyl-pyrazolo[3,4-b]pyridine-5-carbonitrile.
abstract: The title compound, C(20)H(14)N(6)O(2), contains four rings. The dihedral angle between the pyridine ring and the pyrazole ring is 1.9 (1)°, i.e. almost coplanar, which gives rise to a conjugated structure. The dihedral angle between the nitro-substituted phenyl ring and the pyridine ring is 76.3 (1)° and that between the pyrazole ring and the non-substituted phenyl ring is 40.5 (1)°. In the crystal structure, symmetry-related mol-ecules are linked by N-H⋯O and C-H⋯N hydrogen bonds.
authors.affiliation: School of Chemical and Environmental Sciences, Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, Xinxiang, Henan 453007, People's Republic of China.
authors.forename: Xin-Ying
authors.initials: XY
authors.lastname: Zhang
authors.forename: Xiao-Yan
authors.initials: XY
authors.lastname: Li
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Xue-Sen
authors.initials: XS
authors.lastname: Fan
authors.forename: Gui-Rong
authors.initials: GR
authors.lastname: Qu