3-benzyl-7-chloro-3,5-dihydro-4H-[1,2,3]triazolo[4,5-d]pyridazin-4-one 4H-1,2,3-triazolo[4,5-d]pyridazin-4-one, 7-chloro-3,5-dihydro-3-(phenylmethyl)- InChI=1/C11H8ClN5O/c12-10-8-9(11(18)15-14-10)17(16-13-8)6-7-4-2-1-3-5-7/h1-5H,6H2,(H,15,18