Research Article
Euphane Triterpenes from the Bark of Broussonetia papyrifera
Abstract
Four new euphane triterpenes, (3β)-3-(acetyloxy)eupha-7,25-dien-24-one (1), (3β,24R)-3-(acetyloxy)eupha-7,25-dien-24-ol (2), (3β,24S)-eupha-7,25-diene-3,24-diol (3), and (3β,24R)-eupha-7,25-diene-3,24-diol (4) were isolated from the barks of Broussonetia papyrifera, a tree whose roots, barks, and fruits were used as herbal drugs in China. The structures of 1–4 were elucidated on the basis of spectroscopic evidence and chemical methods.
