Simple Hydrocarbons, Ketones, 

 Aldehydes, Esters, etc. 



The simple compounds listed here cannot be treated as 

 a class. The biogenetic origins of many of them should 

 become apparent from the introductions to later chapters. 

 Besides the hydrocarbons shown it might be mentioned 

 that lactarius species sporophores contain cis-polyiso- 

 prene, a rubber-like substance. 



W. D. Stewart, W. L. Wachtel, J. J. Shipman and J. A. 

 Yanko, Science 122 1271 (1955). 



1 Thiourea, CH4N2S, white crystals, m.p. 180-182°. 



S 

 H2N— C— NH2 



Verticillium albo-atrum, Botrytis cinerea 



K. Ovcharov, Compt. rend. acad. sci., U.S.S.R. 16 461 



(1937). 



2 Guanidine, CH5N3, alkaline crystals, generally isolated as salts, 



e.g. acetate, m.p. 229°. 



NH 



H2N— C— NH2 



Boletus edulis, Hydnum aspratum Berk. 

 E. Winterstein, C. Reuter and R. Korolev, /. Chem. Soc. 104 

 433 (1913). 



Seijiro Inagaki, J. Pharm. Soc. Japan 54 824 (1934). 



3 Ethylene, C2H4, colorless gas, b.p. —103°. 



CH2=CH2 



