p. 1399 - 1415
(2007/10/03)(2008/06/13)
1-tert-butyl 2-methyl (2S,4R)-4-(((4-methoxyphenyl)sulfonyl)amino)-1,2-pyrrolidinedicarboxylate
(2S,4S)-2-methyl N-Boc-4-((methylsulfonyl)oxy)pyrrolidine-2-carboxylate
4R-4-hydroxyproline
1-tert-butyl 2-methyl (2S,4S)-4-((benzoyl)oxy)-1,2-pyrrolidinedicarboxylate
1-tert-butyl 2-methyl (2S,4R)-4-azido-1,2-pyrrolidinedicarboxylate