InChI=1/C14H11ClN4O2/c1-8-10(5-16)13(20)19(2)14(21)11(8)7-18-12-4-3-9(15)6-17-12/h3-4,6-7H,1-2H3,(H,17,18)/b11-7+/f/h18H AB1DAF64B3C86B93