1-Sulfo-2-azetidinone derivatives, their production and use.

摘要

1-Sulfo-2-azetidinone derivative of the formula: wherein R<1> is an amino group which may optionally be acylated or protected; and R<2> is a five- or six-membered ring-forming primary or secondary amido group which may contain at least one of nitrogen, sulfur and oxygen atoms as a ring-constituting element; or a pharmaceutically acceptable salt thereof, is novel and possesses excellent antimicrobial activity and b-lactamase inhibitory activity, and is useful as a treatment agent against infections in man and mammals.