InChI=1S/C18H22O8S/c1-24-14-7-3-12(4-8-14)17(16(20)11-19)18(26-27(21,22)23)13-5-9-15(25-2)10-6-13/h3-10,16-20H,11H2,1-2H3,(H,21,22,23)