p. 4099 - 4101
(2006)4R-4-hydroxyproline
(2R,4R)-4-hydroxypyrrolidine-2-carboxylic acid hydrochloride
allo-1-(4-tolylsulfonyl)-4-<<(4-methylphenyl)sulfonyl>oxy>-D-proline ethyl ester
4-(acetyloxy)-1-<(4-methylphenyl)sulfonyl>-D-proline ethyl ester
(2R,4R)-2-ethoxycarbonyl-4-hydroxypyrrolidine hydrochloride