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Exploration of rhizobacteria of the genus Burkholderia as an under-tapped resource of bioactive molecules resulted in the isolation of two new antimicrobial 2-alkyl-4-quinolones. ( E )-2-(Hept-2-en-1-yl)quinolin-4(1 H )-one ( 1 ) and ( E )-2-(non-2-en-1-yl)quinolin-4(1 H )-one ( 3 ) were isolated from the culture broth of strain MBAF1239 together with four known alkylquinolones ( 2 and 4 - 6 ), pyrrolnitrin ( 7 ), and BN-227 ( 8 ). The structures of 1 and 3 were unambiguously characterized using NMR spectroscopy and mass spectrometry. Compounds 1 - 8 inhibited the growth of the marine bacterium Tenacibaculum maritimum , an etiological agent of skin ulcers in marine fish, offering new opportunities to develop antibacterial drugs for fish farming.

beilstein journal of organic chemistry

Two new 2-alkylquinolones, inhibitory to the fish skin ulcer pathogen <i>Tenacibaculum maritimum</i>, produced by a rhizobacterium of the genus <i>Burkholderia</i> sp.

Two new 2-alkylquinolones, inhibitory to the fish skin ulcer pathogen Tenacibaculum maritimum, produced by a rhizobacterium of the genus Burkholderia sp.