New phenolic and aza 3′, 4′-di-O-(−)-camphanoyl-(+)-cis-khellactone (DCK) analogs were synthesized and assayed for inhibition of HIV-1 IIIB replication in H9 lymphocytes. Compound 16, 4-methyl-1′-aza-DCK (4-methyl-aza-DCK), was less lipophilic than 4- methyl-DCK, and retained sub-micromolar anti-HIV activity with EC50 and TI values of 0.77 μM and> 42, respectively. Moreover, it showed moderately improved metabolic stability. ...