InChI=1S/C18H20O8S/c1-10-13-7-11(5-6-25-27(21,22)23)8-16(24-2)18(13)26-17(10)12-3-4-14(19)15(20)9-12/h3-4,7-10,17,19-20H,5-6H2,1-2H3,(H,21,22,23)