4-nitrobenzyl (6R,7S)-3-methyl-7-methylthio-7-(4-nitrobenzylidene)aminoceph-3-em-4-carboxylate

trimethylsilyl (6R,7R)-7-(4-nitrobenzylidene)amino-3-methylceph-3-em-4-carboxylate

4-nitrobenzyl (2'S,6R,7S)-7-formyloxy(phenyl)acetylamino-7-methylthio-3-methylceph-3-em-4-carboxylate

7-Aminodesacetoxycephalosporanic acid

(6R,7S)-7-methylthio-7-(4-nitrobenzylidene)amino-3-methylceph-3-em-4-carboxylic acid