文摘
Fractions from Larrea tridentata with anti-HIV-1 activity (specifically, inhibition of HIV Tat transactivation) were analyzed by GC/MS and NMR and found to contain lignans 1a-i and 2a-d. Assay-guided purification by countercurrent chromatography established 1g (mal. 4) to be especially active. Compounds1b-f,h,i and 2d are new.