3-<2-(acetamido)ethylthio>-6-ethyl-6-methoxy-7-oxo-1-azabicyclo<3.2.0>heptane-2-carboxylic acid methyl ester 、 3-<2-(acetamido)ethylthio>-6-ethyl-6-methoxy-7-oxo-1-azabicyclo<3.2.0>heptane-2-carboxylic acid methyl ester 、
3-<2-(acetamido)ethylthio>-6-ethyl-6-methoxy-7-oxo-1-azabicyclo<3.2.0>heptane-2-carboxylic acid methyl ester 、
对硝基溴化苄 生成 3-<2-(acetamido)ethylthio>-6-ethyl-6-methoxy-7-oxo-1-azabicyclo<3.2.0>heptane-2-carboxylic acid p-nitrobenzyl ester