The molecule is a L-histidine derivative that is L-histidine substituted by a methyl group at position 3 on the imidazole ring; major species at pH 7.3. It is a L-histidine derivative, a non-proteinogenic L-alpha-amino acid and a zwitterion. It is a tautomer of a N(pros)-methyl-L-histidine.
(2S)-2-azaniumyl-3-(3-methylimidazol-4-yl)propanoate