2-amino-4-[4-[(2S)-2-amino-3-hydroxy-3-oxopropyl]-3H-imidazol-2-yl]butanoic acid 2-amino-4-[4-[(2S)-2-amino-3-hydroxy-3-oxo-propyl]-3H-imidazol-2-yl]butanoic acid 2-amino-4-[4-[(2S)-2-amino-3-hydroxy-3-keto-propyl]-3H-imidazol-2-yl]butyric acid 2-(3-amino-3-carboxypropyl)-L-histidine CHEBI:17144 2-(3-Carboxy-3-aminopropyl)-L-histidine C04441