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