DL-Azidoalanine tert-butyl ester , its cas register number is 108283-47-2. It also can be called Alanine, 3-azido-, tert-butyl ester, DL- ; DL-Alanine, 3-azido-, 1,1-dimethylethyl ester ; and DL-3-Azidoalanine tert-butyl ester .