英文别名(6R,6β)-3-[(Acetyloxy)methyl]-7β-methoxy-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[(acetyloxy)methyl]-7-methoxy-8-oxo-7-[[2-(2-thienyl)acetyl]amino]-, (6R,7S)-; Cefoxitin EP Impurity I; (6R,7S)-3-(acetoxymethyl)-7-methoxy-8-oxo-7-(2-(thiophen-2-yl)acetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 
