InChI=1S/C18H16O8S/c19-14-7-11(2-1-5-25-27(20,21)22)6-13-9-16(26-18(13)14)12-3-4-15-17(8-12)24-10-23-15/h3-4,6-9,19H,1-2,5,10H2,(H,20,21,22)