(S)-2-(((4-Amino-1-carboxy-4-oxobutyl)amino)carbonyl)benzoic acid 17283-87-3 Benzoic acid, 2-(((4-amino-1-carboxy-4-oxobutyl)amino)carbonyl)-, (S)- N-alpha-Phthaloyl glutamine WU-366 alpha-N-Phthaloylglutamine