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