In methyl 4-(5-amino-3-phenyl-1H-pyrazol-1-yl)-3-nitro­benzo­ate, C17H14N4O4, the molecules are linked into complex sheets by a combination of N—H⋯N, N—H⋯O and C—H⋯O hydrogen bonds. In the isomeric methyl 3-nitro-4-[(5-phenyl-1H-pyrazol-3-yl)amino]­benzo­ate, mol­ecules exhibit a polarized mol­ecular–electronic structure and are linked into chains of edge-fused rings by a combination of N—H⋯O and C—H⋯O hydrogen bonds.