Chloro-beta-homophenylalanine Chloro-beta-homophenylalanine 3-Amino-4-(2-chloro-phenyl)-butyric acid (6) 3-Amino-4-(3-chloro-phenyl)-butyric acid (6) 3-Amino-4-(4-chloro-phenyl)-butyric acid (6) 3-Amino-4-(2,4-dichloro-phenyl)- butyric acid (6) 3-Amino-4-(3,4-dichloro-phenyl)-butyric acid (6)