| 摘要 |
<p>Compounds of the formula (III): < IMG > (III) wherein R1 is amino, lower alkylamino, a protected amino, or a protected lower alkylamino, R4 is hydrogen or halogen, and R5 is carboxy or a protected carboxy, or salts thereof, are useful as intermediates for the preparation of 3,7-disubstituted-3-cephem-4-carboxylic acid compounds having antimicrobial activity.</p> |
