InChI=1S/C19H16O9S/c20-13(10-27-29(24,25)26)18(22)15(11-6-2-1-3-7-11)16-17(21)12-8-4-5-9-14(12)28-19(16)23/h1-9,15,18,22-23H,10H2,(H,24,25,26)