InChI=1S/C20H22O8S/c1-27-20-12-15(7-10-19(20)23)6-9-17(22)13-16(21)8-5-14-3-2-4-18(11-14)28-29(24,25)26/h2-4,7,10-12,23H,5-6,8-9,13H2,1H3,(H,24,25,26)