Euphane Triterpenes from the Bark of Broussonetia papyrifera

[摘要]：Four new euphane triterpenes, (3 beta)-3-(acetyloxy)eupha-7,25-dien-24-one (1), (3 beta,24R)-3-(acetyloxy)eupha-7,25-dien-24-ol (2), (3 beta,24S)-eupha-7,25-diene-3,24-diol (3), and (3 beta,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 14 were elucidated on the basis of spectroscopic evidence and chemical methods.

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