PROCESS FOR PREPARING NOVEL DERIVATIVES OF CEPHALOSPORIN
摘要
<p>Cephalosporin compounds of the formula <IMAGE> wherein R and R2 are hydrogen or protecting groups, R1 is hydrogen or methoxy, R3 is hydrogen or C1-C4 alkyl and R4 is C1-C4 alkyl, are broad spectrum antibiotics or intermediates thereto.</p>
