In a continued study, 23 3′ R, 4′ R-di-O-(−)-camphanoyl-2′, 2′-dimethyldihydropyrano [2, 3-f] chromone (DCP) derivatives (5–27) were synthesized, and screened for anti-HIV activity against both a non-drug-resistant NL4-3 strain and multiple reverse transcriptase (RT) inhibitor-resistant (RTMDR-1) strain, using 2-EDCP (4) and 2-MDCP (35) as controls. New DCP analogs 5, 9, 14, and 22 exhibited potent anti-HIV activity against HIVNL4-3 ...