InChI=1S/C21H20O12S/c1-30-15-7-12(24)16-11(23)6-14(9-3-2-4-10(22)5-9)32-20(16)17(15)21-18(26)19(13(25)8-31-21)33-34(27,28)29/h2-7,13,18-19,21-22,24-26H,8H2,1H3,(H,27,28,29)