InChI=1S/C21H25NO8/c1-7-8-5-4-6-9(23)11(8)15(24)12-10(7)16(25)13-14(22(2)3)17(26)18(27)20(29)21(13,30)19(12)28/h4-7,10,12-14,16-18,23,25-27,30H,1-3H3/t7?,10?,12?,13?,14?,16?,17?,18?,21-/m0/s1