InChI=1S/C21H23NO9/c1-19(29)8-5-4-6-9(23)12(8)15(26)13-14(19)16(27)17-20(30,18(13)28)10(24)7-11(25)21(17,31)22(2)3/h4-6,14,16-17,23,26-27,29-31H,7H2,1-3H3/t14?,16?,17?,19-,20+,21?/m1/s1