InChI=1S/C18H20O8S/c1-10-16(20)15(17(21)11(2)18(10)25-3)14(19)9-6-12-4-7-13(8-5-12)26-27(22,23)24/h4-5,7-8,20-21H,6,9H2,1-3H3,(H,22,23,24)