A class of antibiotics that includes cephalosporins, characterized by a beta-lactam ring and a cephem core structure.
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(2S)-2-(4-Bromophenyl)-2-hydroxyacetic acid >99%ee
(6R,7S)-7-[2-(4-Hydroxy-phenyl)-acetylamino]-3-(1-methyl-1H-tetrazol-5-ylsulfanylmethyl)-8-oxo-5-oxa-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid
