OPTICALLY ACTIVE ACYLATED CEPHALOSPORIN ANALOGS, PROCESSES FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS COMPRISING THEM
摘要
<p>Optically active acylated cephalosporin analogs represented by the general formula (I) <CHEM> wherein R1 represents a hydrogen or a lower alkyl group, R2 represents a hydrogen or a halogen atom, R3 represents a hydrogen or a protective group of carboxylic acid, X represents an acyl group represented by the formula X1CO, are useful as antibacterial agents and methods for preparing such compounds.</p>
