3,3-Dichloro-2-azetidinone derivatives having basic substituents
申请人:E. R. Squibb & Sons, Inc.
公开号:US04145541A1
公开(公告)日:1979-03-20
Compounds having the formula ##STR1## wherein X is oxygen or sulfur; R.sub.1 is alkyl, cycloalkyl or aryl; R.sub.2 is a nitrogen containing heterocyclic group; A.sub.1 is a saturated bond or an alkylene group having 1 to 4 carbon atoms; and A.sub.2 is an alkylene group having 2 to 5 carbon atoms; have antiinflammatory activity.