InChI=1S/C19H18O12S/c20-3-4-28-13-2-1-10(7-14(13)29-5-6-30-32(25,26)27)19-18(24)17(23)16-12(22)8-11(21)9-15(16)31-19/h1-2,7-9,20-22,24H,3-6H2,(H,25,26,27)