Pyridazinone derivatives and processes for preparing the same
申请人:Tanabe Seiyaku Co., Ltd.
公开号:US05698554A1
公开(公告)日:1997-12-16
Disclosed is a pyridazinone compound represented by the formula (I): ##STR1## wherein X represents hydrogen atom or the like; Y represents a single bonding arm, oxygen atom or sulfur atom; A represents a straight or branched alkylene group which may have a double bond; B represents carbonyl group or thiocarbonyl group; and R.sup.2 represents an alkyl group having 1 to 10 carbon atoms which may be substituted or the like; or B represents sulfonyl group; and R.sup.2 represents a lower alkenyl group or the like; R.sup.1 represents hydrogen atom or the like; R.sup.3 represents hydrogen atom or the like; R.sup.4 represents hydrogen atom or the like; and R.sup.5 represents hydrogen atom or the like, or a pharmaceutically acceptable salt thereof.