Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems containing further heterocyclic rings, e.g. ticarcillin, azlocillin, oxacillin
Compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula , e.g. penicillins, penems containing further heterocyclic rings, e.g. ticarcillin, azlocillin, oxacillin