Lonchocarpol A, a flavanone, demonstrates in vitro inhibitory activity
against methicillin-resistant Staphylococcus aureus and vancomycin-re
sistant Enterococcus faecium. This activity is antagonized by mouse pl
asma, which may account for its lack of in vivo activity. This compoun
d demonstrates no differentiation with respect to the inhibition of RN
A, DNA, cell wall, and protein synthesis.