Cephalosporin derivatives of the formula:
wherein R1 is methyl or ethyl and R2 is a straight-chain or branched alkyl group of 5 to 7 carbon atoms, and their pharmaceutically acceptable salts, which are effective as orally administrable antibiotic agents against both gram-positive- and negative-bacteria, and the production and compositions thereof, are proposed.
式中的
头孢菌素衍
生物:
式中 R1 为甲基或乙基,R2 为 5 至 7 个碳原子的直链或支链烷基及其药学上可接受的盐类,可作为口服抗生素有效地对抗革兰氏阳性菌和阴性菌,以及其生产和组合物。