chemical delivery systems ( cds 's ) based on a dihydropyridine -- -- quaternary pyridinium ion redox system analogous to the naturally occurring nadh -- -- nad+ system were synthesized for a group of staphylococcal penicillinase resistant penicillins , including methicillin , oxacillin , cloxacillin , and dicloxacillin , in order to improve their penetration of the central nervous system ( cns ) .
C0029983
oxacillin
C0009077
cloxacillin