Agathis robusta

From the plant Agathis robusta a group of labdane isomers at C-13 have been isolated and related to 13-e/n-manool after interconvertion using lithium in diaminoethane [110]. The Hymenaea species, i.e H. ablongifolia and H. parvifolia, have been studied and enantiopinifolic acid as well as guamaic acid have been isolated, while enantio-13-ep/-labdanolic acid has been isolated from Trachylobium verrucosum [111]. 

The fatty acid composition of Agathis robusta seeds was determined from the analysis of extracts that were converted to their picolinyl esters and separated on a 20°C Cg column (ELSD) using an acetonitrile mobile phase [1042], Elution was complete in 55 min. The following fatty acids were foimd 18 4 and 20 5 co-ehited 18 3 and 20 4 co-eluted 18 2 and 20 3 co-eluted 18 1 16 0 and 18 0. A 1 mg sample size generated reasonable peak intensities. 

Wolff, RL, Christie, WW, Pedrono, F andMarpeau, AM (1999) Arachidonic, eicosapentaenoic, and biosynthetically related fatty acids in the seed hpids from a primitive gymnosperm, Agathis robusta. Lipids, 34, 1083-1095. 

There has been but one positive test for alkaloids recorded for this small gymnosperm family (A gal his australis). A lest of this species was negative as well as tests on A. moorei, A. ovata, A. robusta, Agathis sp., A. vitensis, Araucaria bididellii, A. cookii, A. cunninghamii,A. excelsa, and A. rulei. 

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