7β-[D-2-Amino-2-(2-thienyl)acetamido]-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-8-oxo-5-thia-1-azabicyclo [4.2.0]oct-2-ene-2-carboxylic acid 、
(1-cyano-1-methylethyl)carbamothioic acid, S-phenyl ester 生成 7β-[[D-[[[(1-cyano-1-methylethyl)amino]carbonyl]amino]-thien-2-ylacetyl]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