(6R)-7t-amino-3-(1-methyl-1H-tetrazol-5-ylsulfanylmethyl)-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-(1-Methyl-1H-tetra-zolyl)thiomethyl-7-aminocephalosporanicacid, 3-[[(1-Methyl-1H-tetrazol-5-yl)thio]methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-ene-2-carboxylic acid, 7-AMino-3-(cisopropyl-1-alkenyl)-3-epheM-4-arboxylic acid, 7-TMCA, (6R-trans)-7-amino-3-{[(1-methyl-1H-tetrazol-5-yl)thio]methyl}-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-amino-2-carboxy-3-[(1-methyl-1,2,3,4-tetrazol-5-yl)-thiomethyl]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene, 7-AMino-3-Methyl tetrazolyl cephalosporanic acid, 7-ACA-3-MMT, 7-amino-3-[[(1-methyltetrazol-5-yl)-thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-AMINO-3-(1-METHYL-5-TETRAZOLYLTHIO)METHYL-3-CEPHEM-4-CARBOXYLIC ACID, 7-Amino-3-(1-methylt, 3-[(1-methyltetrazol-5-ylthio)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 7-Amino-3-methyl tetrazolyl cephalosporanic acid (7-TMCA), 7-Amino-3-[(1-methyltetrazol-5-yl)-thiomethyl]-cephalosporanic acid, 7-amino-3-[[(1-methyl-1H-tetrazol-5-yl)-thio]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid