InChI=1S/C21H26O7S/c1-14(11-21(22)23)7-6-8-18(13-28-29(24,25)26)9-10-19-15(2)12-20(27-5)17(4)16(19)3/h6-12H,13H2,1-5H3,(H,22,23)(H,24,25,26)/b7-6+,10-9+,14-11-,18-8-