(2S,4S)-N-fluorenylmethoxycarbonyl-2-carboxy-4-diphenylphosphinothioyl-pyrrolidine
(2S,4S)-4-(Diphenyl-phosphinothioyl)-2-hydroxymethyl-pyrrolidine-1-carboxylic acid 9H-fluoren-9-ylmethyl ester
(2S,4S)-4-(Diphenyl-phosphinothioyl)-2-formyl-pyrrolidine-1-carboxylic acid 9H-fluoren-9-ylmethyl ester
(2S,4S)-N-tert-butyloxycarbonyl-4-diphenylphosphinothioyl-proline
(2S,4S)-4-(Diphenyl-phosphinothioyl)-2-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester