A method of minimizing or reducing the toxicity of a retinoid having a
free carboxyl group is described. The method comprises the step of
esterifying the carboxyl group of the retinoid with a highly sterically
hindered compound, which is preferably an alcohol. The resulting retinoid
esters are rendered much less toxic than the starting or parent retinoid.
This process provides a retinoid ester analog of reduced toxicity so that
it may be administered orally with minimal side effects and with a much
greater therapeutic window.