70050-43-0 Histidine, alpha-(fluoromethyl)- (9CI) Imidazole-4-propionic acid, alpha-amino-alpha-(fluoromethyl)- alpha-Amino-alpha-(fluoromethyl)imidazole-4-propionic acid alpha-Fluoromethylhistidine alpha-Monofluoromethyl histidine alpha-Monofluoromethylhistidine