InChI=1/C16H13N3O2/c20-15(19-21)9-8-11-4-3-5-12(10-11)16-17-13-6-1-2-7-14(13)18-16/h1-10,21H,(H,17,18)(H,19,20)/b9-8+/f/h17,19H 609E710C638CE7C0