134 



TERPENOIDS AND STEROIDS 



TABLE 9. CYCLIC DITERPENOIDS, STRUCTURES AND OCCURRENCE 



a-camphorene (Cinnamomim camphora) ferruginol (Podocarpus ferrugineus) 



XOOH 



dextro-pimaric acid (Pinus maritima) marrubin (Marrubium vulgare) 



COOH 



COOH 



COOH 



abietic acid (Pinus palustris) 



agathic acid (Agathis alba) 



