(2R,4R)-4-hydroxypyrrolidine-2-carboxylic acid, D-allo-Hydroxyproline, d-cis-4-hydroxyproline, (2R,4R)-(+)-4-Hydroxy-2-pyrrolidinecarboxylic acid D-allo-Hydroxyproline, D-Proline, 4-hydroxy-, cis-, h-d-cis-hyp-oh, (2R,4R)-(+)-4-Hydroxy-2-pyrrolidinecarboxylic acid, cis-4-Hydroxy-D-proline, D-cis-Hydroxyproline