InChI=1S/C20H18O9S/c1-20(23,10-27-30(24,25)26)16-7-13-15(28-16)9-14(21)18-12(8-17(22)29-19(13)18)11-5-3-2-4-6-11/h2-6,8-9,16,21,23H,7,10H2,1H3,(H,24,25,26)