Liarozole Hydrochloride

**Semantic type:** Organic Chemical|Pharmacologic Substance

**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.

**Synonyms:** - (+-)-5-(m-Chloro-alpha-imidazol-1-ylbenzyl)benzimidazole Monohydrochloride - 1H-Benzimidazole, 5-((3-chlorophenyl)-1H-imidazol-1-ylmethyl)-, Monohydrochloride, (+-)- - LIAROZOLE HYDROCHLORIDE - Liarozole HCl - R 75251