InChI=1S/C18H14O8S/c19-9-14(26-27(20,21)22)6-11-1-3-15-13(5-11)8-17(25-15)12-2-4-16-18(7-12)24-10-23-16/h1-5,7-9,14H,6,10H2,(H,20,21,22)