Allyl mercaptan (AM) is a small molecule allyl derivative and an organosulfur compound derived from garlic and a few other genus Allium plants. Its formula is C3H6S. It has been shown to be the most effective HDAC inhibitor of known garlic-derived organosulfur compounds and their metabolites. References Thiols Histone deacetylase inhibitors Allyl compounds Foul-smelling chemicals