C1[C@H]([C@@H]([C@H]([S@@+]1C[C@@H]([C@@H](CO)OS([O-])([O-])[O-])O)CO)O)O 1,4-DIDEOXY-1,4-[[2R,3R)-2,4-DIHYDROXY-3-(SULFOXY)BUTYL]EPISULFONIUMYLIDENE]-D-ARABINITOL INNER SALT SSD