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(2007/10/02)6-aminopenicillanic acid pivaloyloxymethyl ester
4-phenyl-1-(triphenylphosphoranylidene)butan-2-one
(2S,5R,6R)-3,3-Dimethyl-7-oxo-6-(2-oxo-4-phenyl-butyl)-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 2,2-dimethyl-propionyloxymethyl ester
Phenoxyacetyl chloride
pivaloyloxy 6-oxopenicillanate
Oxo-[(3R,4R)-2-oxo-3-(2-oxo-4-phenyl-butyl)-4-(2-phenoxy-acetylsulfanyl)-azetidin-1-yl]-acetic acid allyl ester
(5R,6R)-7-Oxo-6-(2-oxo-4-phenyl-butyl)-3-phenoxymethyl-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester
Phenoxy-thioacetic acid S-[(2R,3R)-4-oxo-3-(2-oxo-4-phenyl-butyl)-azetidin-2-yl] ester