177 



Terpenoids and Steroids 



Cladonia sylvatica L. Harm., CI. impexa Harm. 



This acid also occurs in animals and plants. Since 

 pentacyclic triterpenes are not characteristic of molds, 

 they may be produced by the algal partner of the symbiont 

 lichen. 



T. W. Breaden, J. Keane and T. J. Nolan, Sci. Proc. Roy. 

 Dublin Soc. 23 197 (1944). 



A. Ziircher, O. Jerger and L. Ruzicka, Helv. Chim. Acta 37 

 2145 (1954). 



362 Taraxerene, CgoHjo, colorless crystals, m.p. 237°, [ajo +1° (c 

 0.81 in chloroform). 



Cladonia deformis Hoflm. 



About 15 mg. of pure hydrocarbon were obtained from 

 2.9 kg. of dry lichen. 



Torger Bruun, Acta Chem. Scand. 8 71 (1954). 



363 Friedelin, C30H50O, colorless crystals, m.p. 267-269' 

 (vac), [a]D -21° (c 2.34 in chloroform). 



(dec.) 



^Xp^ 



Cetraria nivalis (L.) Ach., C. islandica (L. ) Ach., C. 

 cucullata (Bell.) Ach., C. crispa (Ach.) Nyl., C. delisei 

 (Bory) Th. Fr. (syn. hiascens Fr. ), Cladonia alpestris (L.) 

 Rabh., Alectoria ochroleuca (Ehrh.) Nyl. and Stereocaulon 

 paschale (L.) Fr. 



Torger Bruun, Acta Chem. Scand. 8 71 (1954). 



