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Grayanane Diterpenoids from the Fruits of Pieris formosa Zhao-Yuan Wu, Hong-Mei Li, Yuan-Dan Li, and Rong-Tao Li

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Grayanane Diterpenoids from the Fruits of Pieris formosa

Zhao-Yuan Wu, Hong-Mei Li, Yuan-Dan Li, and Rong-Tao Li

The Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650050, P. R. China

Reprint requests to Prof. Dr. Rong-Tao Li. Tel: (+86) 871 5103845. Fax: (+86) 871 5103845.

E-mail: rongtaolikm@yahoo.cn

Z. Naturforsch.2012,67b,171 – 175; received November 3, 2011

Four new acylated grayanane diterpenoids, pierisformosins E–H (1–4), togetherwith two known ones, pierisformosins B and C (5,6), were isolated from the fruits ofPieris formosa. The structures and relative configurations of the new compounds were elucidated by means of spectroscopic meth- ods, including 1D and 2D NMR and mass spectrometry.

Key words:Grayanane Diterpenoids,Pieris formosa, Ericaceae

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