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Note | Regular issue | Vol 75, No. 4, 2008, pp.939-946
Published online, 11th January, 2008
DOI: 10.3987/COM-07-11275
New Biflavonoids from Cephalotaxus harringtonia var. fastigiata (Cephalotaxaceae)

Hiroaki Sasaki, Kazuhiko Miki, Kiyotaka Koyama, Kaoru Kinoshita, and Kunio Takahashi*

*Department of Pharmacognosy and Phytochemistry, Meiji Pharmaceutical University, Noshio 2-522-1, Kiyose-shi, Tokyo 204-8588, Japan

Abstract

Three new biflavonoids 1 (2,3-dihydro-6-methylginkgetin), 2 (2,3-dihydro-6-methylbilobetin) and 3 (2,3-dihydro-6-methylsequoiaflavone) have been isolated from the leaves of Cephalotaxus harringtonia K. Koch var. fastigiata Rehder (Cephalotaxaceae) and their structures were elucidated by spectral analysis.