Pfizer Handbook of Microbial Metabolites 218 



452 Barbatolic Acid, C18H14O10, colorless crystals, m.p. 206° (dec.) 

 (s. 190°). 



COOCH2 I OH 



OH ^"° 



Usnea barbata, Alectoria implexa (Hoffm ) Nyl. f. fus- 

 cidula Am. 



Eero E. Suominen, Suomen Kemistileht; 12B 26 (1939). 



453 Pannarin, CisHi.PeCl, colorless prisms, m.p. 216°. 



Q ^"' 



CH,0 i.. \n/ 1„ CHO 

 On 



Pannaria lanuginosa Korb., P. fulvescens Nyl., P. lurida 

 Nyl. 



Itiro Yosioka, /. Pharm. Soc. Japan 61 332 (1941). 



454 Obtusatic Acid (Ramalic Acid), C^gHisO^, colorless needles, 

 m.p. 208° (dec). 



CH3O 1.. OH 1^ COOH 



CHs 



Ramalina pollineria Ach. other Ramalina species 

 Evemic acid, usnic acid and sometimes sekikaic acid 

 were isolated from the same sources. 



Fukuziro Fuzikawa, J. Pharm. Soc. Japan 56 237 (in Ger- 

 man, 25) (1936). (Synthesis) 



