InChI=1S/C21H22O8S/c1-14(2)4-3-5-15(13-28-30(23,24)25)8-10-27-21-16-6-7-20(22)29-19(16)12-18-17(21)9-11-26-18/h4,6-9,11-12H,3,5,10,13H2,1-2H3,(H,23,24,25)/b15-8-