InChI=1S/C21H25NO8/c1-20(29)8-5-4-6-11(23)12(8)15(24)13-9(20)7-10-14(22(2)3)16(25)17(26)19(28)21(10,30)18(13)27/h4-6,9-10,13-14,16-17,23,25-26,29-30H,7H2,1-3H3/t9?,10?,13?,14?,16?,17?,20-,21+/m1/s1