Synonyms: 1-Pyrrolidinecarboxylic acid, 2,2'-([1,1'-biphenyl]-4,4'-diyldi-1H-iMidazole-5,2-diyl)bis-, 1,1'-bis(1,1-diMethylethyl) ester, (2S,2'S)-;(2S,2'S)-di-tert-butyl 2,2'-(4,4'-([1,1'-biphenyl]-4,4'-diyl)bis(1H-iMidazole-4,2-diyl))bis(pyrrolidine-1-carboxylate);(2S,2'S)-