Pfizer Handbook of Microbial Metabolites 



412 



871 Radicinin,* CjoHioOa, yellow crystals, m.p. 220° (dec), [aW 

 -217.4° (c "2.37 in pyridine). 

 Proposed partial structure: 



— -CH3 



=0 -'" 



Stemphylium radicinum Sterad (formerly Alternaria 

 radicina) 



D. D. Clarke and F. F. Nord, Arch. Biochem. and Biophys. 

 59 269, 285 (1955). 



872 Citrinin, C13H14O5, long yellow prisms, m.p. 179° (dec), [aW 

 -34.5° (c 0.60 in alcohol). 



HOOC 



Penicillium citrinum, P. expansum, P. implicatum, 

 P. chrzaszszi, P. citreo-sulfuratum, P. lividum, P. phaeo- 

 janthinellum, Aspergillus terreus, A. candidus, A. niveus 



A. C. Hetherington and H. Raistrick, Trans. Roy. Soc. (Lon- 

 don) B220 269 (1931). (Isolation) 



D. H. Johnson, Alexander Robertson and W. B. Whalley, 

 J. Chem. Soc, 2971 (1950). 



H. H. Warren, Gregg Dougherty and Everett S. Wallis, 

 J. Am. Chem. Soc. 71 3422 (1949). (Synthesis) 



873 Citromycetin (Frequentic Acid), C14H10O7, lemon yeUow hy- 

 drated needles, m.p. 283-285° (dec). 



See entry 413. 



