title: 5-(2-Chloroethyl)-3-hydroxy-2-methyl-4-pyridinecarboxaldehyde (  5 -pyridoxal methyl chloride) and its reaction with N   -acetyl-L-lysine to form a new cyclic imino acid derivative of homopyridoxal.
mesh_terms: D000085:Acetates; D000478:Alkylation; D000596:Amino Acids / Q000032:analysis; D002713:Chlorine; D003500:Cyclization; D006863:Hydrogen-Ion Concentration; D007097:Imines / Q000302:isolation & purification; D007202:Indicators and Reagents; D007536:Isomerism; D008239:Lysine; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008968:Molecular Conformation; D009284:Naphthols / Q000302:isolation & purification; D010847:Picolines / Q000302:isolation & purification; D011730:Pyridoxal; D011732:Pyridoxal Phosphate; D011736:Pyridoxine / Q000302:isolation & purification; D013050:Spectrometry, Fluorescence; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000085:Acetates; D000596:Amino Acids; D007097:Imines; D007202:Indicators and Reagents; D009284:Naphthols; D010847:Picolines; D011730:Pyridoxal; D002713:Chlorine; D011732:Pyridoxal Phosphate; D008239:Lysine; D011736:Pyridoxine