| 6R-trans-7-Amino-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid |
| 7-amino-3-methyl-3-cephem-4-carboxylic |
| 7-amino-3-methyl-3-cephem-4-carboxylic acid |
| 7-amino-3-methyl-3-cephem-4-carboxylicacid |
| 7-Amino-deacetoxy cephalosporanic acid |
