251 Naphthoquinones 



J. M. Anderson and J. Murray, Chem. and Ind., 376 (1956). 

 (Isolation) 



It has since been reported that this perylenequinone is 

 524 probably an artifact of 4,5,4'5'-tetrahydroxy-l,r-dinaphthyl. 



This polyphenol was obtained from the same organism. 

 It was found to oxidize in part to a dark, melanin-like 

 polymer, and in part to the perylenequinone. The struc- 

 ture was proved by synthesis. 



J. D. Bu'Lock and D. C. AUport, Proc. Chem. Soc, 264 

 (1957). 



D. C. Allport and J. D. Bu'Lock, /. Chem. Soc, 654 (1960). 



525 Mycochrysone, C20H14O7, orange-red crystals, m.p. : slow dec. 

 above 180°. 



No N, — OCH3, C— CH3 nor halogen. Three active hy- 

 drogens. 



Partial structure: 



-OH (phenolic or enolic) 

 -H12O3 



An inoperculate discomycetous fungus. 

 G. Read, P. Shu, L. C. Vining and R. H. Haskins, Can. J. 

 Chem. 37 731 (1959). 



526 Actinorhodin, C32H26-30O14, bright red needles, dec. 270°. 



R,] 2COOH 



R2 i,2CH3 



R3 I C8Hi2_16 



' HO O O OH 



Streptomyces coelicolor (Miiller) Waksman and Hen- 

 rici 



