英文别名3-Ethyl 2-(2-methyl-2-propanyl) (1R,3R,5R)-2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate; ethyl (1R,3R,5R)-2-boc-2-azabicyclo[3.1.0]hexane-3-carboxylate; 2-Azabicyclo[3.1.0]hexane-2,3-dicarboxylic acid, 2-(1,1-dimethylethyl)3-ethyl ester, (1R,3R,5R)-; Saxagliptin Impurity 50; O2-tert-butyl O3-ethyl (1R,3R,5R)-2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate; 2-(1,1-Dimethylethyl) 3-ethyl (1R,3R,5R)-2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate; 2-(tert-butyl) 3-ethyl (1r,3r,5r)-2-azabicyclo[3.1.0]hexane-2,3-dicarboxylate 
