New Polyacetylenic Compounds from Terrestrial Plants

2 New Polyacetylenic Compounds from Terrestrial Plants.- The majority of new compounds have been isolated from members of the large Compositae family, and many are reported as a result of Bohlmann s continuing study of this family. Most are closely related to known structural types and their structures therefore follow easily from spectral data. The growing use of high resolution n.m.r. for this purpose is apparent. Unless otherwise indicated the species mentioned belong to the Compositae. 

hydrocarbons (1) and (2) were isolated from Leuoanthemum adustum. Three sources have revealed oxygenated 

A nuinber of new compounds related to falcarinol have also 

Two C g amides (12) and (13) occur in Aohiltea tomentos along with a number of related olefinic amides. 

Interestingly, the isolation of this compound is reported along with that of the first known acetylenic monoterpene (15) and the related olefin (16). It is suggested that the co-occurrence of (14), (15) and (16) may support the assumption that the acetylenic bond is formed by dehydrogenation of a ois double bond. Lyoopevsicon eseulentum (Solanaceae) produces (17) along with falcarindiol and falcarinol after inoculation with Cladosporium 

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