N-((5aR,6R)-1,7-dioxo-1,3,4,5a,6,7-hexahydroazeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-(thiophen-2-yl)acetamide; N-[(5aR,6R)-1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl]-2-Thiopheneacetamide; (5aR-trans)-N-(1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-2-Thiopheneacetamide;3-(hydroxymethyl)-8-oxo-7-[2-(2-thienyl)acetamido]-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid ?-Lactone;3H,7H-Azeto[2,1-b]furo[3,4-d][1,3]thiazine, 2-thiopheneacetamide Deriv.;Deacetylcephalothin Lactone; Cefalotin EP Impurity D
