InChI=1S/C21H23NO9/c1-19(29)8-5-4-6-9(23)12(8)17(27)21(31)16(19)15(26)13-14(22(2)3)10(24)7-11(25)20(13,30)18(21)28/h4-6,13-16,23,26,29-31H,7H2,1-3H3/t13?,14?,15?,16?,19-,20+,21?/m1/s1