InChI=1S/C18H22O7S/c1-11-16(19)15(17(20)12(2)18(11)24-3)14(25-26(21,22)23)10-9-13-7-5-4-6-8-13/h4-8,14,19-20H,9-10H2,1-3H3,(H,21,22,23)