InChI=1S/C20H26O7S/c1-10(2)12-6-13-14(7-15(12)21)20(5)9-11(27-28(24,25)26)8-19(3,4)18(20)17(23)16(13)22/h6-7,10-11,18,21H,8-9H2,1-5H3,(H,24,25,26)