Table 2.

Biofilm formation inhibition exerted by compounds 1, 3, 4, and 8. Each molecule was added at its relative MIC and 2× MIC (µg/mL) values during the biofilm formation of the different pathogens; the inhibition percentages were determined after spectrophotometer reader at 570 nm.

Microbial Strains	1			3			4			8
		Biofilm Inhibition			Biofilm Inhibition			Biofilm Inhibition			Biofilm Inhibition
	MIC	MIC	2× MIC	MIC	MIC	2× MIC	MIC	MIC	2× MIC	MIC	MIC	2× MIC
E. coli ATCC 35218	8	68.3%	BE	64	97.6%	BE	16	1.7%	48.1%	128	54.1%	92.0%
S. aureus ATCC 43387	8	82.2%	BE	128	BE	ND	128	56.6%	BE	128	34.9%	62.9%
E. faecalis ATCC 29212	32	BE	ND	128	BE	ND	128	BE	ND	128	BE	ND
P. aeruginosa ATCC 9027	64	0.5%	0.9%	128	7.8%	BE	128	4.8%	BE	128	7.1%	BE
K. pneumoniae 6/4	8	40.0%	83.7%	128	BE	ND	32	64.7%	96.6%	128	65.8%	98.7%
C. albicans ATCC 10231	64	BE	ND	128	34.6%	BE	32	14.6%	40.9%	128	BE	ND

BE, bactericidal effect: biomass was not determined by spectrophotometer reader (570 nm) because no bacterial growth was visible. in the wells (see also Figure S1); ND: not determined because already bactericidal at MIC value.