3-Heterothio(carbamoylthioacetyl)cephalosporin derivatives of the general formula ##EQU1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, tri(lower alkyl)silyl, a salt forming ion or the group ##EQU2## R.sub.1 is hydrogen, lower alkyl, phenyl, thienyl, or pyridyl; R.sub.2 is lower alkyl or phenyl-lower alkyl; R.sub.3 is a five or six membered nitrogen, sulfur and/or oxygen containing ring system; and R.sub.4 is lower alkyl, phenyl or phenyl-lower alkyl; are useful as antibacterial agents.
通用公式##EQU1##中的3-异
硫代(
氨基甲
硫酰)
头孢菌素衍
生物,其中R为氢、低烷基、苯基-低烷基、三(低烷基)
硅基、盐形成离子或基团##EQU2##;R.sub.1为氢、低烷基、苯基、
噻吩基或
吡啶基;R.sub.2为低烷基或苯基-低烷基;R.sub.3为含有五元或六元氮、
硫和/或氧的环系统;R.sub.4为低烷基、苯基或苯基-低烷基;可用作抗菌剂。