Fenbenicillin;phenbenicillin;(6R)-6-[(α-Phenoxybenzyl)carbonylamino]penicillanic acid;(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[[2-(phenoxy)-2-phenylacetyl]amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid;(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[[2-(phenoxy)-2-phenyl-ethanoyl]amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid;(2S,5R,6R)-7-keto-3,3-dimethyl-6-[[2-(phenoxy)-2-phenyl-acetyl]amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
