1-Methyl-4-(3,4,5-trimethoxybenzoylethyl)piperazine dihydrochloride 17755-68-9 3-(4-Methylpiperazinyl)-3',4',5'-trimethoxypropiophenone dihydrochloride Piperazine, 1-methyl-4-(3,4,5-trimethoxybenzoylethyl)-, dihydrochloride Propiophenone, 3-(4-methylpiperazinyl)-3',4',5'-trimethoxy-, dihydrochloride