替非法尼,游离碱(5毫克)产品是A potent, selective, nonpeptidomimetic inhibitor of farnesyl protein transferase (FPT), an enzyme involved in protein processing (farnesylation) for signal transduction. Displays significant antitumor effects in vivo. Tipifarnib competitively inhibits the farnesylation of lamin B (IC₅₀ = 0.86 nM) and K-RasB (IC₅₀ = 7.9 nM) peptide substrates and inhibits the cell growth of ~75% of a panel of 53 human tumor cell lines tested.