InChI=1S/C21H22N2O6/c1-27-14-7-11(8-15(28-2)19(14)24)20-18(21(25)26)17-13(29-20)4-3-12-16(17)10(5-6-22)9-23-12/h3-4,7-9,18,20,23-24H,5-6,22H2,1-2H3,(H,25,26)