– VP-4604 is a potent anti-methicillin-resistant Staphylococcus aureus (MRSA) agent. VP-4604 exhibits significant microbial growth inhibition toward Staphylococcus aureus (ATCC 43300) with MIC of 4-8 ?g/mL. VP-4604 inhibits the growth of methicillin?resistant Staphylococcus aureus with growth inhibition >95%.