InChI=1S/C20H18O11S/c21-10-6-11(22)16(20-17(25)18(13(24)8-29-20)31-32(26,27)28)19-15(10)12(23)7-14(30-19)9-4-2-1-3-5-9/h1-7,13,17-18,20-22,24-25H,8H2,(H,26,27,28)