p. 513 - 516
(2008/12/21)p. 877 - 880
(2007/10/03)potassium cyanate
(S)-3-amino-2-tert-butoxycarbonylaminopropionic acid
4-azidocarbonylmethyl-5-oxo-oxazolidine-3-carboxylic acid tert-butyl ester
(S)-3-(1,1-dimethylethoxy)carbonyl-5-oxo-4-oxazolidineacetic acid
4-isocyanatomethyl-5-oxo-oxazolidine-3-carboxylic acid tert-butyl ester