85 



Tetronic Acids and Other Lactones and Lactams 



145 Dehydrocarolic Acid, CgHsO^, colorless fine platelets, polymerizes 

 above 80°. 



CH. 



I 

 O 



CH2 



I 



c 



CH2 o 



Penicillium cinerascens Biourge 



Carlosic acid, spinulosin and gliotoxin also were pro- 

 duced. 



A. Bracken and H. Raistrick, Biochem. J. 41 569 (1947). 



146 Carolic Acid, C9Hig04, colorless needles, m.p. 132° [a]-,nn +84° 

 (c 0.50 in water). 



CH, 



CH2 



I 

 O 



CH, 



\ 



CH3 o 



p. charlesii G. Smith 



Percival W. Clutterbuck, Walter N. Haworth, Harold Rai- 

 strick, Geo. Smith and Maurice Stacey, Biochem. J. 28 94 

 (1934). 



147 Carolinic Acid, CyHioOg, colorless prisms, m.p. 123° (dec), 

 W]:a6i +60° (c 0.34 in water). 



HO 



C— CH2- CH2— COOH 



CH3 o 



Penicillium charlesii G. Smith 



