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