Three tetrahydrofuran lignans [l-3} were obtained from the leaves of Bupleurum salicifolium, of which busaliol {l} and busalicifol {2} are novel. Their structures were determined by spectral and chemical methods. Also obtained in this investigation were a number of other lignans, coumarins, a polyacetylene, and a triterpenoid, all of known structure.

Canary Islands Government (Project No. 11/08-03-90), CCYT (Projeet SAF 92-1028) and the Colegio Libre de Emerito for financial help. J.A.G.P. is indebted to the Canary Islands Government for a postdoctoral grant.

6 páginas, 2 tablas, 23 referencias.-- cmartin@irnase.csic.es

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