In the title compound, C13H13N3O, the phenyl ring makes a dihedral angle of 47.0 (1) with the mean plane of the –NC( O)N– unit, while the dihedral angle between the latter mean plane and the aminophenyl ring is 84.43 (7). In the crystal, molecules are linked via N—HO hydrogen bonds involving the central –NHC( O)NH– units, forming chains running parallel ... إقراء المزيد