Synonyms: (S,S',R,R')-TANGPHOS;(S,S,R,R)-TANGPHOS;(1S,1S',2R,2R')-(+)-1,1'-DI-T-BUTYL-[2,2']-DIPHOSPHOLANE;(1S,1S',2R,2R')-1,1'-DI-TERT-BUTYL-(2,2')-DIPHOSPHOLANE;(1S,1'S,2R,2'R)-(+)-1,1'-Di-t-butyl-[2,2']-diphospholane,min.95%(S,S,R,R)-TANGPHOS;(1S,1S'',2R,2R'')-(+)-1,1''-DI-T-BUTYL-[2,2'']-DIPHOSPHOLANE (S,S,R,R)-TANGPHOS