A series of nonsymmetrically substituted cyclic ureacarboxamides was synthesized and evaluated for antiviral activity as a function of the inhibition of HIV-protease. Selected protease inhibitors were also evaluated for oral bioavailability. The synthesis, pharmacology, quantitative structure-activity relationship (QSAR), and pharmacokinetics for the series will be discussed.

*Anti-HIV Agents/CHEMICAL SYNTHESIS *HIV Protease Inhibitors/CHEMICAL SYNTHESIS *Urea/CHEMICAL SYNTHESIS

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