InChI=1S/C19H18O9S/c1-24-18-6-11(5-14(9-20)28-29(21,22)23)4-13-8-16(27-19(13)18)12-2-3-15-17(7-12)26-10-25-15/h2-4,6-8,14,20H,5,9-10H2,1H3,(H,21,22,23)