1,3-Dimethyl-4-(2-(4-phenyl-1-piperazinyl)ethyl)-3H-pyrazolo(3,4-c)isoquinoline-5(4H)-one HCl 5H-Pyrazolo(3,4-c)isoquinolin-5-one, 3,4-dihydro-1,3-dimethyl-4-(2-(4-phenyl-1-piperazinyl)ethyl)-, hydrochloride 74123-74-3