1(2H)-Pentalenone, 3,4,5,6-tetrahydro-3-methyl-2-(1-piperazinylmethyl)-, hydrochloride 3-Methyl-2-(1-piperazinylmethyl)-3,4,5,6-tetrahydro-1(2H)-pentalenone hydrochloride 88364-14-1