| 摘要 |
Compounds represented by the following formula WHEREIN A is a substituted or unsubstituted heterocyclic radical and T is a C2-C5 alkyl, alkenyl, cycloproplymethyl, cyclobutylmethyl or cyclopentyl group A PROCESS FOR THEIR PREPARATION AND NOVEL INTERMEDIATES THEREFOR ARE DISCLOSED. These compounds are useful antibiotics. |
