p. 5026 - 5034
(2021/05/07)p. 2370 - 2373
(2015/06/02)p. 1113 - 1118
(2014/04/03)p. 8070 - 8075
(2011/11/28)p. 291 - 299
(2009/12/24)4-toluenesulfonyl azide
potassium ethyl 3-(trifluoroborato)-butanoate
ethyl aminocrotonate
ethyl acetoacetate
3-aminobutanoic acid ethyl ester