6β-((R)-2,2-dimethyl-3-nitroso-5-oxo-4-phenyl-imidazolidin-1-yl)-1ξ-oxo-1λ4-penicillanic acid 在
盐酸 、
对甲苯磺酸 作用下,
以
1,4-二氧六环 为溶剂,
生成 (6R)-7t-((R)-2,2-dimethyl-5-oxo-4-phenyl-imidazolidin-1-yl)-3-methyl-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid