中文名称：氧头孢烯母核
- (2R,6R,7R)-7-(Benzoylamino)-3-methylene-8-oxo-5-oxa-1-azabicyclo[4.2.0]octane-2-carboxylic acid diphenylmethyl ester
- (6R,7R)-7-amino-3-[(z)-2-(4-methylthiazol-5-yl]ethenyl-8-oxo-5-thia-1-azabicylo[4.2.0]oct-2-ene-2-carboxylic acid
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