InChI=1/C19H16N2O4/c22-19(23)14-8-12-11-3-1-2-4-13(11)20-18(12)17(21-14)10-5-6-15-16(7-10)25-9-24-15/h1-7,14,17-18,21H,8-9H2,(H,22,23)/t14-,17+,18+/m0/s1/f/h20H C2BF3771A1BD792F