InChI=1S/C21H22O8S/c1-21(2)11-10-16-19(28-21)9-8-15(20(16)27-3)18(23)12-17(22)13-4-6-14(7-5-13)29-30(24,25)26/h4-11,18,23H,12H2,1-3H3,(H,24,25,26)