Novel benzoxazine or benzothiazine derivatives and process for the preparation of the same
申请人:DONG-A PHARM. CO., LTD.
公开号:EP0510235A1
公开(公告)日:1992-10-28
Novel benzoxazine or benzothiazine derivatives of the formaula(A),
wherein R₁, R₂ and R₃ are the same or different and represent hydrogen atom or C₁₋₄ lower alkyl group and X and Y are the same or different and represent oxygen or sulfur atom;
have an excellent inotropic effect and can be used as cardiac stimulant.