It is on the World Health Organization`s List of Essential Medicines, a list of the most important medication needed in a basic health system. ==Synthesis== Tetracaine is synthesized from 4-butylaminobenzoic acid. The ethyl ester is formed through an acid-catalyzed esterification reaction. Base-catalyzed transesterification is achieved by boiling.... Found on http://en.wikipedia.org/wiki/Tetracaine