2-((4-Methyl-1-piperazinyl)imino)acetophenone hydrochloride 2-((N'-Methyl-N-piperazino)imino)acetophenone hydrochloride 25561-46-0 ACETOPHENONE, 2-((4-METHYL-1-PIPERAZINYL)IMINO)-, HYDROCHLORIDE