HETEROCYCLES

Heterocycles has a pay-per-view service for Non-subscribers.
You will be able to directly purchase the full text article through PayPal.
Your purchased Paper can be downloaded after the payment is completed.
An e-mail will be sent the URL to download the paper.
If you have any questions, please contact: purchase@heterocycles.com

Price: ¥ 4,400 (Yen only)
Period: This Article can be accessed for 7 days.

■ New Cytotoxic Nor- and Bisnorditerpene Dilactones, Makilactones A-D, from Podocarpus macrophyllus D. Don

Kimihiko Sato, Keito Sugawara, Hirono Takeuchi, Hyun-Sun Park, Toshiyuki Akiyama, Tetsuo Koyama, Haruhiko Fukaya, Yutaka Aoyagi, and Koichi Takeya*

*School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan

Abstract

Four new nor- and bisnorditerpene dilactones, makilactones A-D, were isolated from a MeOH extract of bark and root of Podocarpus macrophyllus D. Don (Podocarpaceae) with three known diterpene dilactones. The structures of the new nor- and bisnorditerpene dilactones having a 7:8, 9:11-dienolide moiety were determined by the spectroscopic studies, including 1D and 2D NMR spectral analysis, and single crystal X-Ray crystallographic analysis. Two of the presently isolated compounds were shown to be very strongly cytotoxic.