Certain chemical compounds are important in many aspects of everyday life. Enol and ESTER are two examples of such compounds. Enol is a type of organic compound that contains a hydroxyl group (-OH) attached to a double-bonded carbon atom. It is an important intermediate in many biochemical reactions. ESTER is an organic compound formed by the reaction between an acid and an alcohol, with the release of water. It is used in many industries, such as the production of perfumes, plastics, and pharmaceuticals.