(S)-Ala-3-(alpha-(S)-chloro-3-(S)-hydroxy-2-oxo-3-azetidinylmethyl)-(S)-ala (S)-Alanyl-3-(alpha-(S)-chloro-3-(S)-hydroxy-2-oxo-3-azetidinylmethyl)-(S)-alanine 54922-56-4 Butanoic acid, L-alanyl-gamma-chloro-gamma-(3-hydroxy-2-oxo-3-azetidinyl)-L-alpha-amino-, (S-(R*,R*))-