Benzonitrile, 4-((5-((4-(3-chlorophenyl)-3-oxo-1-piperazinyl)methyl)-1H-imidazol-1-yl)methyl)-, monohydrochloride
Farnesyltransferase/Geranylgeranyltransferase Inhibitor L-778,123 is a benzonitrile derivative capable of inhibiting some prenyltransferases. L-778,123 is a dual inhibitor of farnesyl:protein and geranylgeranyl:protein transferases; both enzymes catalyze prenylation of oncoprotein KRAS, a prerequisite step in activation of KRAS in signal transduction pathway of apoptosis. Although this agent was developed in part as an anti-KRAS agent, L-778,123 failed in a Phase I trial to inhibit KRAS, which is associated with many types of solid tumors.