Pfizer Handbook of Microbial Metabolites 230 



488 a-Collatolic Acid (Lecanorolic Acid, Lecanoral), C29H34O9 color- 

 less needles, m.p. 124°. 



CH3CH0CH.2CH2CH0COCH2 ^^^ ^.. 



COO OH 



CH3O \r,^ I COOH 



CH2COCH2CH2CH2CH2CH3 



Cetraria collata Miill. Arg., Lecanora atra (Hudson) 

 Ach., L. grumosa (Pers.) Rohl. 



Yasuhiko Asahina, Yoshinari Kanaoka and Fukuziro Fu- 

 zikawa, Ber. 66B 649 (1933). 



489 Microphyllic Acid, C29H36O9, colorless needles, m.p. 116°. 

 CH3CH2CH2CH2CH2COH2C 



CHsO^ ^OH I XOOH 



CH2COCH2CH2CH2CH2CH3 



Cetraria japonica Zahlbr. 



Some chloroatranorin was isolated from the same ex- 

 tract. The yield of microphyllic acid was about 4^^ of 

 the lichen weight. 



Yasuhiko Asahina and Fukuziro Fuzikawa, Ber. 68B 2022 

 (1935). 



