Synonyms: 2-Thiopheneacetamide,N-(1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-,(5aR-trans)- (8CI); 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-(hydroxymethyl)-8-oxo-7-[2-(2-thienyl)acetamido]-, g-lactone (7CI);3H,7H-Azeto[2,1-b]furo[3,4-d][1,3]thiazine, 2-thiopheneacetamide deriv.;Deacetylcephalothin lactone