InChI=1S/C21H27N2O9/c1-9(24)23(3)7-6-12-11-5-4-10(8-13(11)22-18(12)21(23,2)30)31-20-16(27)14(25)15(26)17(32-20)19(28)29/h4-5,8,14-17,20,22,25-27,30H,6-7H2,1-3H3,(H,28,29)