H 1935 (OTTO) 2-Hydroxy-4-methylpyridine, 99% Cas 13466-41-6 - used in a study to investigate the equilibrium of self-association of 2-pyrrolidone (A) and 2-hydroxyl-4-methyl-pyridine (B), also the hetero-association between A and B in [2H3] acetonitrile by NMR.