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