1,2,4-Triazolo(4,3-b)pyridazin-3(2H)-one, 6-(4-chlorophenyl)-8-phenyl- 130392-75-5 6-(4-Chlorophenyl)-8-phenyl-1,2,4-triazolo(4,3-b)pyridazin-3(2H)-one BRN 3624653