英文别名(7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-methyl-5,8-dioxo-5λ⁴-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; Cefalexin Impurity 11; [6R-[6α,7β(R*)]]-7-[(Aminophenylacetyl)amino]-3-Methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid 5-Oxide; Imp. J:Cephalexin Sulfoxide; Cefradine Impurity 2; Cefalexin Sulfoxide 
