InChI=1S/C20H22O12S/c21-11-3-1-10(2-4-11)17-15(23)7-13-14(22)5-12(6-16(13)32-17)31-19-18(24)20(25,8-29-19)9-30-33(26,27)28/h1-6,15,17-19,21-25H,7-9H2,(H,26,27,28)