Pfizer Handbook of Microbial Metabolites 



252 



The yield was about 15% of the mycelial weight. 



Hans Brockmann and Ernst Hieronymus, Chem. Ber. 88 

 1379 (1955). 



This compound has been shown to be an artifact, and 

 by careful isolation under acidic conditions the precursor, 

 protoactinorhodin, with the nucleus below, can be isolated. 



OH OH 



OH OH 



OH OH 



-> Actino- 

 rhodin 



527 Protoactinorhodin was isolated as pale red prisms, dec. near 



330°, probably C30H30O14. 



Hans Brockmann and Volkmar Loeschcke, Chem. Ber. 88 

 778 (1955). 



528 Xylindein, C34H26O11, deep brown high-melting, pleochroic leaf- 



lets. 



The structure is obscure, but an extended quinone sys- 

 tem of the type 



was postulated. 



Chlorosplenium aeruginosum (Oeder ex Fries) De Not 

 Fritz Kogl and G. von Taeuffenbach, Ann. 445 170 (1925). 

 Fritz Kogl and Hanni Erxleben, ibid. 484 65 (1930). 



529 Rhodomycetin, gradual darkening at 300°. 



Dark fed powder, red in acid solution and blue in alka- 

 line. U.V. 235, 540, 580 m^x. 



Reddish violet in H0SO4, positive FeCla, H0O2 and 

 Na2So04-2HoO reduction. 



Resembles actinorhodin. 



Streptomyccs griseus 



Gerald Shockman and Selman A. Waksman, Antibiotics 

 and Chemotherapy 1 68 (1951). 



530 Naphthoquinone from Mycobacterium phlei, yellow oil, U.V. 243, 



249, 261, 270, 328 m^ in isooctane. 



Appears to have about 30 carbon atoms and is probably 

 a vitamin K,. Mol. wt. about 620. 



