Pfizer Handbook of Microbial Metabolites 



174 



L. Ruzicka, R. Denss and O. Jeger, Helv. Chim. Acta 29 204 

 (1946). 



W. Voser, M. V. Mijovic, H. Heusser, O. Jeger and L. Ru- 

 zicka, ibid. 35 2414 (1952). 



353 Physarosterol, C3i,H-,.0;i, colorless crystals, m.p. 137-139°, [cxW^ 



—55.3° (c 0.5 in chloroform). 



Probably a C3,,, unsaturated, trihydroxy sterol with one 

 hydroxyl group in the 3y3-position. 



Pliysarum polycephaliim 



This organism also produces a yellow pigment. 



C. F. Emanuel, Nature 182 1234 (1958). 



354 Polyporenic Acid C, C;^iH4(j04, colorless crystals, m.p. 273-276°, 



[a]D +8° (in pyridine). 



HOOC 



Polyporus betulirms, P. benzoinus, P. pinicola 

 A. Bowers, T. G. Halsall and G. C. Sayer, /. Chem. Soc, 

 3070 (1954). 



355 Agaricolic Acid, C;^,H4sO;^ (probably), colorless crystals, m.p. 



226°, [or],,-" +34.4° (in pyridine). 



Probably a monohydroxy triterpene acid. It occurs 

 together with ergosterol and eburicoic acid, agaricic acid 

 and other metabolites. 



Polyporus officinalis 



J. Valentin and S. Kniilter, Pharm. Zentralhalle 96 478 

 (1957). 



356 Dehydrotumulosic Acid, C31H4SO4. 



HOOC 



