Synonyms: (6r,7r)-7-({[2-(aminomethyl)phenyl]acetyl}amino)-8-oxo-3-[(tetrazolo[1,5-b]pyridazin-6-ylsulfanyl)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;56748-54-0;BB-S-226;AC1L4S6M;BB-S226;KST-1A6099;52727-70-5;BB-S 226;AR-1A6936;(6R,7R)-7-[[2-[2-(aminomethyl)phenyl]acetyl]amino]-8-oxo-3-(tetrazolo[1,5-b]pyridazin-6-ylsulfanylmethyl)-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, 7-(((2-(aminomethyl)phenyl)acetyl)amino)-8-oxo-3-((tetrazolo(1,5-b)pyridazin-6-ylthio)methyl)-, (6R-trans)-;7-(o-Aminomethylphenylacetamido)-3-(tetrazolo(4,5-b)pyridazin-6-ylthiomethyl)-3-cephem-4-carboxylic acid