(5R)-3,3-dimethyl-6-(4-nitro-benzylideneamino)-7-oxo-(5rH)-4-thia-1-aza-bicyclo[3.2.0]heptane-2c,6c-dicarboxylic acid dibenzyl ester 生成 (5
R)-3,3-dimethyl-7-oxo-6-(2-phenoxy-acetylamino)-(5
rH)-4-thia-1-aza-bicyclo[3.2.0]heptane-2
c,6
c-dicarboxylic acid dibenzyl ester