1,2,4-Triazolo(3,4-a)phthalazin-3(2H)-one, 8-chloro-2-(2-(4-phenyl-1-piperazinyl)ethyl)- 124556-75-8 8-Chloro-2-(2-(4-phenyl-1-piperazinyl)ethyl)-1,2,4-triazolo(3,4-a)phthalazin-3(2H)-one