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