Cephalosporin compounds of the formula [I]:
wherein R¹ is an amino or a protected amino group, R² is a hydroxy group, a protected hydroxy group or a lower alkoxy group, R³ is a carboxyl group or a protected carboxyl group, R⁴ is a hydrogen atom, a lower alkyl group, a lower alkenyl group or a group of the formula: -CH₂R⁴¹, where R⁴¹ is a nucleophilic residue, R⁵ is a carboxyl group, a protected carboxyl group or a group of the formula -COO-, R⁶ is a hydrogen atom or a lower alkyl group, and the broken line means the presence or absence of a double bond, or a pharmaceutically acceptable salt thereof, have excellent antimicrobial activities and are useful as antimicrobial drugs.
公式[I]的
头孢菌素化合物:其中R¹是
氨基或保护的
氨基基团,R²是羟基、保护的羟基或较低的烷氧基,R³是羧基或保护的羧基,R⁴是氢原子、较低的烷基、较低的烯基或公式为-CH₂R⁴¹的基团,其中R⁴¹是亲核残基,R⁵是羧基、保护的羧基或公式为-COO-的基团,R⁶是氢原子或较低的烷基,而断裂线表示双键的存在或不存在,或其药学上可接受的盐,具有出色的抗微
生物活性,并可用作抗微
生物药物。