A carboxylate ester. R and R' denote ony alkyl or aryl group. R can an aa be a hydrogen atom

In chemistry, esters are chemical compoonds derived frae an acid (organic or inorganic) in which at least ane -OH (hydroxyl) group is replaced bi an -O-alkyl (alkoxy) group.[1]


  1. IUPAC, Compendium o Chemical Terminology, 2nt ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "esters".