2-(4-Aminophenyl)-2,4-dihydro-5-(1-pyrrolidinyl)-3H-pyrazol-3-one 2-Pyrazolin-5-one, 1-(p-aminophenyl)-3-(1-pyrrolidinyl)- 30707-77-8 3H-Pyrazol-3-one, 2-(4-aminophenyl)-2,4-dihydro-5-(1-pyrrolidinyl)- EINECS 250-304-4 NSC 340301