InChI=1S/C21H23NO8/c1-8-9-5-4-6-10(23)13(9)17(26)15-19(28)21(30)12(25)7-11(24)16(22(2)3)14(21)18(27)20(8,15)29/h4-6,8,14,16,18,23,27-30H,7H2,1-3H3/t8?,14?,16?,18?,20?,21-/m0/s1