InChI=1/C18H13N3O3/c1-24-12-8-6-11(7-9-12)16(22)14(10-19)17-20-15-5-3-2-4-13(15)18(23)21-17/h2-9,20H,1H3,(H,21,23)/b17-14-/f/h21H D189B129BAF3231E