InChI=1S/C19H16O8S/c1-11(20)18(27-28(23,24)25)15(12-7-3-2-4-8-12)16-17(21)13-9-5-6-10-14(13)26-19(16)22/h2-10,15,18,21H,1H3,(H,23,24,25)