Pfizer Handbook of Microbial Metabolites 278 



604 7^-Pyrromycinone, C22H16O7, red needles, m.p. 236° (sublimes). 

 OH O OH 



CH3 



XH3^ 



OH O COOCH3 



Streptomyces spp. 



Hans Brockmann and Werner Lenk, Chem. Ber. 92 1880 

 (1959). (Structure) 



Hans Brockmann and Hans Brockmann, Jr., Naturwissen- 

 sctiaften 47 135 (1960). (Revised structure) 



605 ^-Pyrromycinone, CooHooO^, orange-red needles, m.p. 216° (sub- 

 limes), [air,.'" +74 ±6° (in chloroform). 



OH O 



CH 

 OH O COOCH3 



Streptomyces spp. 



Brockmann and collaborators have isolated about a 

 dozen pigments of this type from various unclassified 

 streptomycetes. 



Hans Brockmann and Burchard Franck, Chem. Ber. 88 1792 

 (1955). 



H. Brockmann, Luis Costa Pla and W. Lenk, Angew. Chem. 

 69 477 (1957). 



H. Brockmann and P. Boldt, Naturwissenschaften 44 616 

 (1957). 



Hans Brockmann and Werner Lenk, Chem. Ber. 92 1880 

 (1959). (Structure) 



Idem., Naturwissenschaften 47 135 (1960). (Revised 

 structure) 



606 c-Pyrromycinone (Rutilantinone), C2L.H2()Of,, orange-red needles, 

 m.p. 213°, [aW +143 ±7° (c 1.0 in chloroform). 



XHo 

 OH O COOCH3 



Streptomyces spp. 



