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