259 Anthraquinones 



Xanthoria fallax (Hepp.) Arn. 



Takao Murakami, Pharm. Bull. (Tokyo) 4 298 (1956). 



549 Tritisporin ( to-Hydroxycatenarin ) , Cjr.HioO;, brown needles, 

 m.p. 260-262°. 



°" CH,OH 



Helminthosporium triticivulgaris Nisikado 

 S. Neelakantan, Anna Pecker and H. Raistrick, Biochem. J. 

 64 464 (1956). 



550 Flavoskyrin, Ci.-,Hi^O.-,, yellow crystals, m.p. 208° (dec), [cf]u 

 -295° (in dioxane). 



PenicilHvm islandiciim Sopp. 



Shoji Shibata, Takao Murakami and Michio Takito, Pharm. 

 Bull. (Tokyo) 4 303 (1956). (Structure) 



551 Compound A ( 1,4,7, 8-Tetrahydroxy-2-methylanthraquinone), 

 Ci,Hi,0,. 



An optically inactive compound (no melting point 

 given). Treatment with cone. H2SO4 yields an anthraqui- 

 none, Ci.-Hi„0.,, red crystals, m.p. 255°, with the follow- 

 ing structure: 



O 



Penicillium islandicum 



Sten Gatenbeck, Acta Chem. Scand. 12 1985 (1958). 



Idem., ibid. 13 705 (1959). 



