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