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