1-benzyl-7-chloro-1,5-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-1,5-dihydro-1-(phenylmethyl)- InChI=1/C8H9N3S/c1-6-5-8(12-2)10-7-3-4-9-11(6)7/h3-5H,1-2H