p. 3731 - 3744
(2007/10/02)3-(hydroxymethyl)-7α-methoxy-8-oxo-2-(pyrrolidinocarbonyl)-5-thia-1-azabicyclo<4.2.0>oct-2-ene 5,5-dioxide
t-butyl 3-acetoxymethyl-7α-methoxy-3-cephem-4-carboxylate
Acetic acid (6R,7S)-7-methoxy-5,5,8-trioxo-2-(pyrrolidine-1-carbonyl)-5λ6-thia-1-aza-bicyclo[4.2.0]oct-2-en-3-ylmethyl ester
3-(acetoxymethyl)-7α-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
2-methyl-3-mercapto-5-oxo-6-hydroxy-2,5-dihydro-1,2,4-triazine