New Biflavonoids from Cephalotaxus harringtonia var. fastigiata (Cephalotaxaceae)

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.