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