| 摘要 |
<p>ARYLMALONAMIDO-1-OXADETHIACEPHALOSPORINS Antibacterial 1-oxadethiacephalosporins of the formula: where Ar is , , , , or (in which Acyl is organic or inorganic acyl); COB1 and COB2 each is carboxy or protected carboxy; Het is , , or (in which COB3 is carboxy or protected carboxy); and Y is hydrogen or methoxy; with proviso that when Y is methoxy, Het is !, the preparation and use of them are disclosed.</p> |
