p. 307 - 317
(2007/10/03)4-carboxy-3-hydroxyphenyl azide
(2S,4R)-2-benzyl 1-tert-butyl 4-azidopyrrolidine-1,2-dicarboxylate
N-(tert-butoxycarbonyl)-(2S,4R)-4-hydroxyproline benzyl ester
(2S,4R)-4-amino-1-(tert-butoxycarbonyl)pyrrolidine-2-carboxylic acid
succinimide 4-azidosalicylate