InChI=1S/C20H19O12S/c21-10-5-13(22)12-7-16(31-20-18(25)17(24)14(23)8-29-20)19(30-15(12)6-10)9-2-1-3-11(4-9)32-33(26,27)28/h1-7,14,17-18,20-25H,8H2,(H,26,27,28)