(6R,7R)-3-((4-carbamoylpyridin-1-ium-1-yl)methyl)-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate; 4-(Aminocarbonyl)-1-[[(6R,7R)-2-carboxy-8-oxo-7-[[2-(2-thienyl)acetyl]amino]-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]pyridinium Inner Salt Hydrate; Cepalonium Hydrate; Cephalonium Hydrate; Cepravin DC Hydrate; Cepravin Dry Cow Hydrate; (6R-trans)-4-(Aminocarbonyl)-1-[[2-carboxy-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]pyridinium Inner Salt Hydrate