Synonyms: 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylicacid, 3-[(acetyloxy)methyl]-7-[(hydroxyphenylacetyl)amino]-8-oxo-, [6R-[6a,7b(R*)]]-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-7-[[(2R)-hydroxyphenylacetyl]amino]-8-oxo-, (6R,7R)-(9CI); (6R,7R,2'R)-3-Acetoxymethyl-7-(2'-hydroxy-2'-phenylacetamido)ceph-3-em-4-carboxylicacid; 7-D-Mandelamidocephalosporanic acid