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