InChI=1/C21H22O12/c22-10-2-1-7(3-12(10)24)18-13(25)6-9-11(23)4-8(5-14(9)32-18)31-21-17(28)15(26)16(27)19(33-21)20(29)30/h1-5,13,15-19,21-28H,6H2,(H,29,30)/t13-,15?,16?,17?,18-,19?,21?/s2