InChI=1/C18H16N2O4/c1-10-17(24-15-5-3-2-4-14(15)23-10)18(22)19-12-6-7-13-11(8-12)9-16(21)20-13/h2-8,10,17H,9H2,1H3,(H,19,22)(H,20,21)/t10-,17+/m0/s1/f/h19-20H D01B270676274AA5