Pfizer Handbook of Microbial Metabolites 220 



Aspergillus nidulans NRRL No. 2006 

 F. M. Dean, A. D. T. Erni and Alexander Robertson, /. 

 Chem. Soc, 3545 (1956). 



458 Thamnolic Acid, CigHigOn, pale yellow crystals, m.p. 223° 

 (dec). 



^"' COO. ^"^ COOH 



CH3O I OH HO 



COOH 



Thamnolia vermicularis (Sw.) Schaer., Cladonia poly- 

 dactyla Flk., CI. digitata, other Cladonia, Parmeliopsis 

 and Pertusaria spp. 



Yasuhiko Asahlna and Michio Hiraiwa, Ber. 69B 330 

 (1936). 



Idem., ibid. 72 1402 (1939). 



459 Chloroatranorin, CigHi^OsCl, colorless crystals, m.p. 208°. 



CH3 



Parmelia furfuracea Ach., P. physodes Ach., Evernia 

 prunastri, etc., wide occurrence 



Georg Roller and Karl Popl, Monatsh. 64 106 (1934). 

 Idem. f ibid. 64 126 (1934). 



460 Atranorin (Atranoric Acid, Usnarin, ParmeHn), CigHigOg, color- 

 less prisms, m.p. 196°. 



^"' coo 



Atranorin occurs in about 90 different lichens. 

 d-Usnic acid also often is present. 



