InChI=1/C18H20N2O5/c1-20-6-5-11-8-15-17(25-10-24-15)18(22-2)16(11)13(20)9-12(19-21)14-4-3-7-23-14/h3-4,7-8,13,21H,5-6,9-10H2,1-2H3/b19-12-/t13-/m0/s1 3CE1051D9F4BBA62