, Volume 12, Issue 3, pp 308-311

Quorum sensing inhibitors from the red alga,Ahnfeltiopsis flabelliformis

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Abstract

Three new acylhomoserine lactone (AHL) inhibitors have been isolated from the Korean red alga.Ahnfeltiopsis flabelliformis, via bioactivity-guided fractionation using the recombinantAgrobacterium tumefaciens liquid culture bioassay. Unlike the majority of AHL inhibitors reported to date, these compounds were α-d-galactopyranosyl-(1→2)-glycerol (floridoside) (1), betonicine (2), and isethionic acid (3), all of which are structurally unrelated to AHLs.