Comparison of minimum inhibitory concentration (MIC) determined by microbroth dilution assay for 3 controls and 6 synthetic analogues against methicillin-susceptible Staphylococcus aureus (MSSA – ATCC 29213) and two clinical isolates of methicillin-resistant S. aureus (MRSA – A8090, ST5 genotype) and vancomycin-intermediate S. aureus (VISA – A8094, ST5 genotype). *(2Z, 4E)-7-methylocta-2,4-dienoic acid.