p. 2493 - 2503
(2007/10/02)(1E,5R)-3-Phenylmethyl-4-thia-2,6-diazabicyclo[3.2.0]hept-2-en-7-one
2-((1R,5R)-3-Benzyl-7-oxo-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-methyl-but-2-enoic acid benzyl ester
diphenylmethyl bromoacetate
6-β-phenylacetamidopenicillanic acid-(1S)-oxide
Penicillin G sodium