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