InChI=1S/C21H23NO8/c1-19(28)9-5-4-6-11(23)15(9)17(26)16-10(19)7-12-20(29,18(16)27)13(24)8-14(25)21(12,30)22(2)3/h4-6,10,12,16,23,28-30H,7-8H2,1-3H3/t10?,12?,16?,19-,20-,21?/m1/s1