Pfizer Handbook of Microbial Metabolites 496 



983 2-n-Nonyl-4-oxyquinoline, CigHogON, colorless crystals, m.p. 

 139°. 



CH2CH2CH2CH0CH0CH2CH2CH2CH3 



Pseudomonas aeruginosa 



Ibert C. WeUs, J. Biol. Chem. 196 331 (1952). (Synthesis) 



984 2-n-Nonyl-4-oxyquinoline N-Oxide, C18H25O2N, colorless leaflets, 

 m.p. 148°. 



OH 



i CHzCHsCHzCHzCHjCHzCHzCHiCHj 

 O 



Pseudomonas aeruginosa 



J. W. Cornforth and A. T. James, Biochem. J. 63 124 

 (1956). (Synthesis) 



985 2-n-Undecyl-4-oxyquinoline N-Oxide, C20H09O2N, colorless leaf- 

 lets, m.p. 148.5°. 



i CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH3 

 O 



Pseudomonas aeruginosa 



J. W. Cornforth and A. T. James, Biochem. }. 63 124 (1956). 

 (Synthesis) 



k. PYRAZINES, DIKETOPIPERAZINES 



Diketopiperazines are produced by molds, yeasts and 

 lichens, but none has been reported from bacteria. Be- 

 sides those listed in this section, others are classified else- 

 where, for example, echinulin and gliotoxin under indoles. 



Flavacol and pulcherriminic acid seem to be derived 



