^'JO 



Anthraquinones 



Penicillium cyclopium Westling 



Winston K. Anslow, John Breen and Harold Raistrick, 

 Biochem. J. 34 159 (1940). 



537 Boletol, Ci-.HsO-, red needles, m.p. 275-280° (dec). 

 O COOH ._ HO O 



HO O HO O COOH 



Boletus luridus Schaeff. ex Fries, B. badius Ft., B. 

 chrysenteron Bull., B. satanas Lenz, B. subtomentosus 

 Linn. 



The higher yielding species gave about 1 g. of pure 

 material from 20 kg. of fruiting body. 



Fritz Kogl and W. B. Deijs, Ann. 515 10, 23 (1935). (Syn- 

 thesis ) 



538 Pachybasin, C15H10O3, yellow needles, m.p. 78°. 



O 



Pachybasium candidum (Sacc.) Peyronel 

 Pachybasin, like most of the other anthraquinone pig- 

 ments, occurs as one constituent of a mixture of pigments. 

 Chrysophanol was identified as one of the other con- 

 stituents of this mixture. 



Shoji Shibata and Michio Takido, Pharm. Bull. (Tokyo) 3 

 156 (1955). 



539 Chrysophanol ( Chry sophanic Acid), C15H10O4, dark yellow leaf- 

 lets, m.p. 196°. 



O 



Penicillium islandicum Sopp, Pachybasium candidum 

 (Sacc.) Peyronel, Chaetomium affine Corda 



The 9-anthrone corresponding to chrysophanol has been 

 isolated from higher plants. 



