| 摘要 |
<p>Penicillin or cephalosporin antibiotics represented by following formula: <IMAGE> <IMAGE> <IMAGE> [where <IMAGE> is an acyl group derived from an alpha -amino acid, N-ammonium salt of alpha -amino acid, or N-(C1 to C10) acyl- alpha -amino acid; COOM is carboxy or carboxylate salt group] ARE PREPARED BY TREATING AN AMINO COMPOUND SELECTED FROM A GROUP CONSISTING OF 6-AMINOPENICILLANIC ACID, 7-AMINOCEPHALOSPORANIC ACID, 7-AMINODEACETOXYCEPHALOSPORANIC ACID, AND THEIR SALTS WITH AN ESTER REPRESENTED BY FOLLOWING FORMULA:</p> |
