5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-7-((phenyl((trimethylsilyl)oxy)acetyl)amino)-, trimethylsilyl ester, (6R-(6alpha,7beta(R*)))- 64119-70-6 Bis(trimethylsilyl)cefamandole Btms-cefamandole