Sitagliptin Impurity G

Chemical Name: Benzenebutanoic acid, β-​[[(1,​1-​dimethylethoxy)​carbonyl]​amino]​-​3,​4-​difluoro-​, (βR)​-; (βR)-β-[[(1,1-Dimethylethoxy)carbonyl]amino]-3,4-difluorobenzenebutanoic acid ;(3R)-3-[(tert-Butoxycarbonyl)amino]-4-(3,4-difluorophenyl)butanoic acid ;(R)-3-(tert-Butoxycarbonylamino)-4-(3,4-difluorophenyl)butanoic acid

Smile: O=C(OC(C)(C)C)N[C@@H](CC(O)=O)CC1=CC(F)=C(F)C=C1