N-chlorocarbonyl-N-methyl-4-phenylbutyramide 、 7-(D-α-aminophenylacetamido)-3-(1-methyl-1H-tetrazol-5-ylthio)methylceph-3-em-4-carboxylic acid 以17.5%的产率得到Sodium 7-[D-α-[3-(4-phenylbutanoyl)-3-methylureido]phenylacetamido]-3-(1-methyl-1H-tetrazol-5-ylthio)methylceph-3-em-4-carboxylate