New prenylated isoflavones and a prenylated dihydroflavonol from Millettia pachycarpa

Extraction of Millettia pachycarpa Benth. gave 5,7,4′-trihydroxy-6,8-diprenylisoflavone (1a), 5,7,4′-trihydroxy-6,3′-diprenylisoflavone (2a), 5,7,3′,4′-tetrahydroxy-6,8-diprenylisoflavone (3a) and (2R, 3R)-5,4′-dihydroxy-8-prenyl-6″,6″-dimethylpyrano[2″,3″: 7,6]-dihydroflavonol (4a) whose structures were established by chemical transformations and spectroscopic means. Pectolinarigenin and salvigenin were isolated from Buddleia macrostachya Benth.     

δ-Lactones of polyhydroxy-C26 acids in Eupatorium pilosum

Isolation and structure determination of the δ-lactones of Z-5,7,9,11-tetrahydroxy- and Z-5,7,9,11,15-pentahydroxyhexacos-2-enoic acids from Eupatorium pilosum is reported. The flavones salvigenin and cirsimaritin were also found.