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Communication | Special issue | Vol 10, No. 1, 1978, pp.123-131
Published online, 1st January, 1970
DOI: 10.3987/S-1978-01-0123
New Congeners of Cytotoxic Nor-diterpenoid Dilactones in Podocarpus nagi : C19 Lactones of an α-Pyrone Type and a 7:8,9:11-Dienolide Type

Yuji Hayashi,* Takeshi Matsumoto, and Takeo Sakan

*Faculty of Pharmaceutical Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan

Abstract

Two new members of the cytotoxic nor-diterpenoid dilactones were obtained from root bark of Podocarpus nagi and the structures were established by the correlation with the known lactones.