Acetamide,2-(4-pyridinylthio)-N-(1,4,5a,6-tetrahydro-1,7-dioxo-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)-,(6R-trans)-; 3H,7H-Azeto[2,1-b]furo[3,4-d][1,3]thiazine, acetamide deriv.;Cephapirin lactone; Deacetylcephapirin lactone
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