InChI=1S/C19H16O11S/c1-27-12-6-8(2-4-10(12)20)16-14-15(19(23)28-16)17(29-18(14)22)9-3-5-11(21)13(7-9)30-31(24,25)26/h2-7,14-17,20-21H,1H3,(H,24,25,26)