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