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(2007/10/05)1ξ-oxo-6β-dimethoxyphosphorylamino-1λ4-penicillanic acid 2-oxo-2-phenyl-ethyl ester
1ξ-oxo-6β-(2-phenyl-acetylamino)-1λ4-penicillanic acid 2-oxo-2-phenyl-ethyl ester
3-deacetyloxy-7-aminocephalosporanic acid
α-bromoacetophenone
(6R)-7t-dimethoxyphosphorylamino-3-methyl-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2-oxo-2-phenyl-ethyl ester