Chem. Pharm. Bull.

Chem. Pharm. Bull., 50(4),541-543, April 2002

Notes

Lignans and Sesquiterpenes from Magnolia praecocissima

Hironobu TAKAHASHI,^a Seiko YOSHIOKA,^a Shoichi KAWANO,^b Hiroshi AZUMA,^b and Yoshiyasu FUKUYAMA^*,a

Institute of Pharmacognosy, Faculty of Pharmaceutical Sciences, Tokushima Bunri University,^a Yamashiro-cho, Tokushima 770-8514, Japan and Department of Botany, Kyoto University, Graduate School of Science ^b Kyoto 606-0100, Japan.

A new lignan 1 was isolated together with the five known lignans 2-6 and four sesquiterpenes 7-10 from the seeds of Magnolia praecocissima. The structure of 1 was elucidated by analysis of spectroscopic data and chemical reaction. Furthermore, the absolute configurations of 1, 2, and 3 were determined by the modified Mosher's method.

Key words Magnolia praecocissima; Magnoliaceae; lignan; sesquiterpene; modified Mosher's method

Notes

Lignans and Sesquiterpenes from Magnolia praecocissima

Hironobu TAKAHASHI,a Seiko YOSHIOKA,a Shoichi KAWANO,b Hiroshi AZUMA,b and Yoshiyasu FUKUYAMA*,a

Institute of Pharmacognosy, Faculty of Pharmaceutical Sciences, Tokushima Bunri University,a Yamashiro-cho, Tokushima 770-8514, Japan and Department of Botany, Kyoto University, Graduate School of Science b Kyoto 606-0100, Japan.

Hironobu TAKAHASHI,^a Seiko YOSHIOKA,^a Shoichi KAWANO,^b Hiroshi AZUMA,^b and Yoshiyasu FUKUYAMA^*,a

Institute of Pharmacognosy, Faculty of Pharmaceutical Sciences, Tokushima Bunri University,^a Yamashiro-cho, Tokushima 770-8514, Japan and Department of Botany, Kyoto University, Graduate School of Science ^b Kyoto 606-0100, Japan.