InChI=1S/C21H28N2O8/c24-15-3-1-2-13-10-6-11(9-23(13)15)14-7-12(4-5-22(14)8-10)30-21-18(27)16(25)17(26)19(31-21)20(28)29/h1-3,10-12,14,16-19,21,25-27H,4-9H2,(H,28,29)