InChI=1S/C19H18O9S/c1-24-18-6-11(3-2-4-27-29(21,22)23)5-12-7-15(28-19(12)18)13-8-16-17(9-14(13)20)26-10-25-16/h5-9,20H,2-4,10H2,1H3,(H,21,22,23)