has role penicillin antibacterial drug oxacillin(1-) oxacillin CHEBI:7809 6beta-(5-methyl-3-phenylisoxazol-4-yl)penicillanic acid oxazocillin chebi_ontology (2S,5R,6R)-3,3-dimethyl-6-{[(5-methyl-3-phenylisoxazol-4-yl)carbonyl]amino}-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 5-methyl-3-phenyl-4-isoxazolyl-penicillin Oxacillin (5-methyl-3-phenyl-4-isoxazolyl)penicillin A penicillin antibiotic carrying a 5-methyl-3-phenylisoxazole-4-carboxamide group at position 6β.