InChI=1S/C18H16O8S/c19-14(5-6-25-27(20,21)22)11-1-3-15-13(7-11)9-17(26-15)12-2-4-16-18(8-12)24-10-23-16/h1-4,7-9,14,19H,5-6,10H2,(H,20,21,22)