Pfizer Handbook of Microbial Metabolites 258 



Theodore Posternak, Compt. rend. soc. phys. his. nat. Ge- 

 neve 56 28 (1939). 



546 Catenarin, Ci^HiyOe, red plates, m.p. 246°. 



HO ° °" 



Helminthosporium catenarium Drechsler, H. grami- 

 neum Rabenhorst, H. velutinum Link, H. triticivulgaris 

 Nisikado, Penicillium islandicum Sopp, Aspergillus am- 

 stelodami (Mangin) Thorn and Church 



More than 15% of the mycelial weight of H. catenarium 

 was catenarin. 



Winston Kennay Anslow and Harold Raistrick, Biochem. J. 

 35 1006 (1941). (Synthesis) 



547 Asperthecin, Ci^HioO^j, chestnut brown needles, no m.p. 



O HO O 



CH.OH HO 1 I! CH2OH 



Aspergillus quadrilineatus Thom and Raper and other 

 species of the Aspergillus nidulans group 



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

 66 234 C1957). 



A closely related pigment has been observed, which may 

 have been a tautomeric or reduced form of asperthecin. 

 It could not be isolated because of its ready conversion to 

 asperthecin. 



B. H. Howard and H. Raistrick, Biochem. J. 59 475 (1955). 



548 Fallacinal, Ci«Hi„0,., orange-yellow needles, m.p. 251°. 

 CH3O ? CHO 



