403 Dibenzofurans and Related Substances 



857 Porphyrilic Acid, C,,;H,o07, colorless needles, m.p. 280-283° 



(dec). 



O—CH... OH 



CH.> X I 



HO ' ^"3 



COOH 



Haematomma coccineum (Dicks.), H. porphyrium 

 (Pers.) 



Porphyrilic acid occurs together with Z-usnic acid and 

 atranorin. 



Carl Axel Wachtmeister, Acta Chem. Scand. 10 1404 

 (1956). (Structure) 



858 2-(6-Hydroxy-2-inethoxy-3,4-methylenedioxyphenyl)-benzofuran, 



CieHioOg, colorless crystals, m.p. 118°. 



Yeast 



A yield of 0.5-2.0 mg. per pound of bakers' yeast was 

 reported. 



M. A. P. Meisinger, Frederick A. Kuehl, Jr., E. L. Rickes, 

 Norman G. Brink, Karl Folkers, Martin Forbes, Friederich 

 Zilliken and Paul Gyorgy, J. Am. Chem. Soc. 81 4979 (1959). 

 (Structure) 



859 Pannaric Acid, CigHioO;, colorless needles, m.p. 243-245°. 



OH CH3 ^^^^ 



COOH 



COOH 



Crocynea membranacea (Dicks.) Zahlbr. = Pannaria 

 lanuginosa Ach. 



O. Hesse, /. prakt. Chem. 70 1 (1904). (Isolation) 



