NCIt definition : The fumarate salt of an orally-active benzimidazole derivative with potential antineoplastic
activity. As a retinoic acid metabolism blocking agent (RAMBA), liarozole inhibits
cytochrome P450-dependent all-trans-retinoic acid (ATRA)-4-hydroxylase, resulting
in an increase in endogenous ATRA production, inhibition of cell proliferation, and
induction of cell differentiation. This agent also inhibits aromatase, the enzyme
that catalyzes the final, rate-limiting step in estrogen biosynthesis.;