<chemical> A cephalorsporin antibiotic. ... Pharmacological action: cephalosporins. ... Chemical name: 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-((acetyloxy)methyl)-7-((aminophenylacetyl)amino)-8-oxo-, (6R-(6alpha,7beta(R*)))- ... (12 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973