Table 1.

Quorum sensing inhibitory activity of psammaplin A (1), bisaprasin (2) and hemifistularin 3 in the P. aeruginosa PAO1 lasB-gfp and rhlA-gfp biosensor strains.

Compound	IC50 (μM)		% Inhibition (100 μg/mL)
	lasB-gfp	rhlA-gfp	lasB-gfp	rhlA-gfp
1	14.02	4.99	85.4%	63.3%
2	3.53	2.41	80.1%	68.9%
Hemifistularin 3	-	-	31.4%	49.1%