| abstract |
The invention concerns 7 beta -amino-cepham-3-one-4-carboxylic acid compounds, particularly esters thereof, and the N-substituted, especially N-acylated derivatives of such compounds. They can be used as intermediates, for example, for the manufacture of the corresponding enol ethers and esters, as well as the corresponding 3-unsubstituted 7 beta -amino-3-cephem-4-carboxylic acid compounds, which show outstanding pharmacological effects.n[US4389524A] |