InChI=1S/C20H26O7S/c1-11(10-27-28(24,25)26)12-8-13-14(9-15(12)21)20(4)7-5-6-19(2,3)18(20)17(23)16(13)22/h8-9,11,18,21H,5-7,10H2,1-4H3,(H,24,25,26)