InChI=1S/C21H25NO8/c1-19(28)9-5-4-6-11(23)15(9)17(26)21(30)13(19)7-10-16(22(2)3)12(24)8-14(25)20(10,29)18(21)27/h4-6,10,13,16,18,23,27-30H,7-8H2,1-3H3/t10?,13?,16?,18?,19-,20-,21?/m1/s1