title: 1-Methyl-7-(4-nitro-phen-yl)-3-phenyl-pyrazolo[3,4-b]pyrrolo[3,4-d]pyridine-6,8(3H,7H)-dione.
abstract: In the title compound, C(21)H(13)N(5)O(4), the dihedral angles formed between the planes of the phenyl and nitro-phenyl rings and that of the heterotricyclic plane are 41.29 (7) and 61.35 (6)°, respectively. In the crystal, weak C-H⋯O interactions help to establish the packing.
authors.forename: Jose R
authors.initials: JR
authors.lastname: Sabino
authors.forename: Cecília M A
authors.initials: CM
authors.lastname: Oliveira
authors.forename: Carlos A M
authors.initials: CA
authors.lastname: Fraga
authors.forename: Eliezer J
authors.initials: EJ
authors.lastname: Barreiro
authors.forename: Valéria
authors.initials: V
authors.lastname: de Oliveira
authors.forename: Ricardo
authors.initials: R
authors.lastname: Menegatti