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