Effect of the cinnamaldehyde analogs (100 µM) on different QS-regulated phenotypes.

*;Code refers to structures in Figure 1.Results are expressed as the percentage inhibition compared to the untreated control (± SD).NS: no significant inhibition compared to an untreated control (p>0.05; Mann-Whitney U).**; compound was used in 50 µM concentration.***; for V. cholerae NCTC 8457 results are expressed as the percentage increase (instead of decrease) in biofilm biomass compared to the untreated control.