Similar names: 1H-Imidazole-4-ethanaminium, α-carboxy-2,3-dihydro-N,N,N-trimethyl-2-thioxo-, inner salt, (αS)-; 1H-Imidazole-4-ethanaminium, α-carboxy-2,3-dihydro-N,N,N-trimethyl-2-thioxo-, hydroxide, inner salt, (S)-; Ammonium, [1-carboxy-2-(2-mercaptoimidazol-4-yl)ethyl]trimethyl-, hydroxide, inner salt, L-(+)- (8CI); (2S)-3-(2-Sulfanyl-1H-imidazol-4-yl)-2-(trimethylazaniumyl)propanoate; (S)-5-(2-Carboxy-2-(trimethylammonio)ethyl)-1H-imidazole-2-thiolate; 1H-Imidazole-4-ethanaminium, α-carboxy-2,3-dihydro-N,N,N-trimethyl-2-thioxo-, inner salt, (S)-; 2-Mercapto-N,N-dimethylhistidine methyl ester betaine; 2-Mercaptohistidine betaine; 2-Mercaptohistidine trimethylbetaine; Ergothioneine; Ergothionine; Histidine, 2-mercapto-, trimethylbetaine; Histidine, 2-mercapto-N,N-dimethyl-, betaine; L-Ergothioneine; NSC 7175; Phytothioneine; Sympectothion; Thiasine; Thioneine; Thiotane; thiotaine; L-(+)-Ergothioneine