InChI=1/C21H22O12/c22-8-4-10(23)9-6-12(25)17(32-14(9)5-8)7-1-2-13(11(24)3-7)31-19-16(27)15(26)18(20(28)29)33-21(19)30/h1-5,12,15-19,21-27,30H,6H2,(H,28,29)/t12-,15?,16?,17-,18?,19?,21?/s2