1,4-Bis(3,4,5-trimethoxybenzoylethyl)piperazine dihydrochloride 16760-48-8 3-Piperazinylenebis(3',4',5'-trimethoxypropiophenone) dihydrochloride Piperazine, 1,4-bis(3,4,5-trimethoxybenzoylethyl)-, dihydrochloride Propiophenone, 3-piperazinylenebis(3',4',5'-trimethoxy-, dihydrochloride