InChI=1S/C19H20O8S/c1-11(2)4-5-13-16(21)12-6-7-15(20)26-17(12)14-8-9-19(3,27-18(13)14)10-25-28(22,23)24/h4,6-9,21H,5,10H2,1-3H3,(H,22,23,24)