title: 3-Amino-1-phenyl-4-(propan-2-yl-idene)pyrazol-5(4H)-one.
abstract: In the title mol-ecule, C(12)H(13)N(3)O, the phenyl and the pyrazole rings make a dihedral angle of 7.5 (2)°. Inter-molecular N-H⋯O hydrogen bonds involving the amino group link the mol-ecules into a three-dimensional framework.
authors.forename: Ren-Gao
authors.initials: RG
authors.lastname: Zhao
authors.forename: Jie
authors.initials: J
authors.lastname: Lu
authors.forename: Ji-Kun
authors.initials: JK
authors.lastname: Li