SEARCH Articles Figures Tables 7- -3-cephem-4-carboxylic acid 7- 3-methyl-3-cephem-4-carboxylic acid 7-Amino-3- -3-cephem-4-carboxylic 7-Amino-3-methyl-3-cephem-4-carboxylic 7-Amino-3-vinyl-3-cephem-4-carboxylic 7-[3- -3-cephem-4-carboxylic A3-Cephem-4-carboxylic acid A3-cephems Arylmethyl-, 3-Heteroarylmethyl-, and 3-Fluoromethyl-3-cephems Cephem 10-oxide ring Cephem 2-thia Cephem dioxides Cephem dioxides allylic oxidation Cephem dioxides oxidative rearrangement Cephems Cephems Cephems cefazolin Cephems cefixime Cephems ceftizoxime Cephems properties Cephems synthesis Methoxy- and Other 3-Oxygen-Substituted Cephems Methoxy-3-cephem-4-carboxylic acid 94 ---acetate Sulfur- and 3-Nitrogen-Substituted Cephems Unsubstituted Cephems