(6R,7R)-7-amino-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; Cefalexin Monohydrate Impurity B (EP/BP); (6R,7R)-7-Amino-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid; 7-Amino-3-deacetoxycephalosporanic Acid; Deacetoxycephalosporanic Acid; 7-ADCA; 7-Aminodesacetoxycephalosporanic acid; Cefadroxil related compound B (USP); 7-Aminodesacetoxycephalosporanic Acid