InChI=1S/C20H24O7S/c1-26-19(12-8-15-5-9-17(21)10-6-15)14-18(22)11-7-16-3-2-4-20(13-16)27-28(23,24)25/h2-6,9-10,13,19,21H,7-8,11-12,14H2,1H3,(H,23,24,25)