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