Pivenfrine
Pivenfrine, also known as pivalylphenylephrine or phenylephrine pivalate, is a sympathomimetic and mydriatic agent which was never marketed. It is the 3-pivalyl ester of phenylephrine. Pivenfrine has much greater lipophilicity than phenylephrine. Higher lipophilicity is known to greatly improve corneal permeability, as in dipivefrine. Another related compound is etilefrine pivalate.