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Boc-(S)-3-amino-4-(4-fluoro-phenyl)-butyric acid218608-97-0100 % similar Boc-(R)-3-amino-4-(4-fluoro-phenyl)-butyric acid218609-00-8100 % similar (S)-3-(Boc-amino)-4-phenylbutyric acid51871-62-679 % similar Boc-(R)-3-amino-4-(4-methyl-phenyl)-butyric acid269398-85-878 % similar Boc-(R)-3-amino-4-(4-iodo-phenyl)-butyric acid269396-71-676 % similar Boc-(S)-3-amino-4-(4-bromo-phenyl)-butyric acid270062-85-676 % similar Boc-(R)-3-amino-4-(3,4-difluoro-phenyl)-butyric acid269396-59-075 % similar Boc-(S)-3-amino-4-(4-pyridyl)-butyric acid219297-13-974 % similar Sitagliptin defuoro impurity 3851307-12-572 % similar Boc-(R)-3-amino-4-(3-thienyl)-butyric acid269726-92-369 % similar (S)-3-((tert-Butoxycarbonyl)amino)-4-(4-nitrophenyl)butanoic acid127106-71-269 % similar Boc-(R)-3-amino-4-(4-nitro-phenyl)-butyric acid219297-12-869 % similar 3-[(tert-Butoxycarbonyl)amino]-3-(4-fluorophenyl)propanoic acid284493-72-769 % similar Boc-(R)-3-amino-4-(2-naphthyl)-butyric acid219297-10-669 % similar Boc-(R)-3-amino-4-(3-methyl-phenyl)-butyric acid269398-83-667 % similar Boc-(S)-3-amino-4-(3-chloro-phenyl)-butyric acid270596-39-967 % similar Boc-(R)-3-amino-4-(3-trifluoromethyl-phenyl)-butyric acid269726-74-166 % similar Boc-(S)-3-amino-4-(3-trifluoromethyl-phenyl)-butyric acid270065-77-566 % similar Boc-L-4-fluorophe41153-30-465 % similar Fmoc-(S)-3-amino-4-(4-fluoro-phenyl)-butyric acid270062-83-463 % similar