InChI=1S/C20H20O10S/c1-10(8-30-31(26,27)28)2-4-13-16(23)7-17-18(19(13)24)20(25)14(9-29-17)12-5-3-11(21)6-15(12)22/h2-3,5-7,14,21-24H,4,8-9H2,1H3,(H,26,27,28)