p. 1132 - 1139
(2011/11/05)N-(tert-butoxycarbonyl)-trans-4-formyloxy-D-proline ethyl ester
4R-4-hydroxyproline
(2R,4S)-tert-butyl 4-hydroxy-2-(hydroxymethyl)pyrrolidine-1-carboxylate
(2R,4R)-4-hydroxyproline-1,2-dicarboxylic acid 1-tert-butyl 2-ethyl ester
(2R,4R)-4-hydroxypyrrolidine-2-carboxylic acid hydrochloride