[The new penicillins].
D008712:Methicillin; D010404:Penicillin V / Q000031:analogs & derivatives; D010406:Penicillins
D010406:Penicillins; C100209:phenethicillin; D008712:Methicillin; D010404:Penicillin V
METHICILLIN; PENICILLIN; PHENETHICILLIN