Table 2. The minimum inhibitory concentration (MIC in μg/mL) of vancomycin in the absence and presence of a subinhibitory concentration (½ × MIC) of diphenylurea compounds 1 or 2 against vancomycin-resistant S. aureus (VRSA) isolates.

VRSA strain	MIC of vancomycin	MIC of vancomycin + 1	Fold re-sensitization of VRSA to vancomycin	MIC of vancomycin + 2	Fold re-sensitization of VRSA to vancomycin
VRS4	512	4	127-fold	64	7-fold
VRS10	512	128	3-fold	8	63-fold