(2S,3S)-H-APNS-OH

(2S,3S)-3-AMINO-2-HYDROXY-4-PHENYL-BUTYRIC ACID

(2S,3S)-3-AMINO-2-HYDROXY-4-PHENYLBUTANOIC ACID

(2S,3S)-3-(Z-AMINO)-2-HYDROXY-4-PHENYLBUTYRIC ACID