InChI=1/C18H18N2O4/c1-11(21)20-16(14-5-3-4-6-18(14)24-2)10-15(19-20)13-8-7-12(22)9-17(13)23/h3-9,16,22-23H,10H2,1-2H3/t16-/m0/s1 96B7CF7D25E82F1E