271 Anthraquinones 



Penicilliinn islaudiciim Sopp. 



This pigment is produced in a mixture including is- 

 landicin, iridoskyrin, erythroskyrin, catenarin, luteoskyrin 

 and skyrin. The weight of the pigment mixture is about 

 10% of the weight of the dry mycelium. 



Shoji Shibata and Isao Kitagawa, Pharm. Bull. (Tokyo) 4 

 309 (1956). 



588 Luteoskyrin, C;^oH^,._.0,^,, yellow needles, m.p. 273° (dec), [aln^^ 

 -880° (in acetone). 



HO 



OH 



HO 

 HO 



O OH 

 O OH 



CHs 



CH3 



^1 



HO 



OH 



Penicillium islandicum Sopp. 



Shoji Shibata and Isao Kitagawa, Pharm. Bull. (Tokyo) 4 

 309 (1956). (Structure) 



589 Cercosporin, C^oH.sO^o, red crystals, m.p. 241°, [a]:,,,,!.'" +470° 

 (c 0.5 in chloroform). 



This pigment contains two methoxyl groups, two 

 quinoid carbonyls, two phenolic hydroxyls and two alco- 

 holic hydroxyls. The yield was 79 mg. per gram of dry 

 mycelium. 



Shimpei Kuyama and Teiichi Tamura, /. Am. Chem. Soc. 

 79 5725, 5726 (1957). 



3,591 Chaetochrysin and Chaetoflavin, C^iHoj-Oi,, yellow crystals, no 

 592 melting point, and Chaetoalbin, CaoHo^.-joOj], white crys- 



tals, no melting point. 



These uncharacterized compounds were isolated from 

 mycelial extracts along with chrysophanol. They seem to 

 be modified dianthraquinones. They yield some chrysoph- 

 anol on alkaline oxidation, contain one methoxyl group 

 and have high optical rotations. 



Chaetomiiim affine Corda 



Vincent Arkley, F. M. Dean, Peter Jones, Alexander Robert- 

 son and John Tetaz, Croat. Chem. Acta 29 141 (1957). 



