Sixteen novel compounds; 3alpha-methoxyserrat-14-en-21beta-ol (1) and 3beta-methoxyserrat-14-en-21beta-ol (2) and their curcumin, kojic acid, quercetin, and baicalein conjugates (3)-(18) were designed, synthesized, and evaluated for in vitro anti-HIV-1 reverse transcriptase (RT) activity in infected C8166-CCR5 cells, a human CD4(+) T-lymphocyte cell line. Among them, kojic acid derivatives, 9-12 showed significant biological activity. In particular, the compound 13, the conjugate of two molecules of 3alpha-methoxyserrat-14-en-21beta-ol (1) and one molecule of kojic acid, exerted significant anti-HIV activity with an EC50 value of 0.12microg/mL.
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