H-Glu-bNA

H-Glu-βNA

gamma-glutamyl-2-naphthylamide

(4S)-4-amino-5-keto-5-(2-naphthylamino)valeric acid

(4S)-4-amino-5-(naphthalen-2-ylamino)-5-oxopentanoic acid

(4S)-4-azanyl-5-(naphthalen-2-ylamino)-5-oxo-pentanoic acid