InChI=1S/C20H28O7S/c1-17(2)13-4-5-19-6-7-20(10-19,11-21)15(23)8-14(19)18(13,3)9-12(22)16(17)27-28(24,25)26/h6-7,13-14,16,21H,4-5,8-11H2,1-3H3,(H,24,25,26)