Etilefrine pivalate INNTooltip International Nonproprietary Name; developmental code name K-30052) is a sympathomimetic agent which was never marketed. It is the 3-pivalate ester of etilefrine (ethylnorphenylephrine) and has much greater lipophilicity than etilefrine. Some related compounds include pivenfrine (phenylephrine pivalate) and dipivefrine (epinephrine dipivalate), which were developed as mydriatic agents.