申请人:NISSAN CHEMICAL IND LTD
公开号:WO2000012492A1
公开(公告)日:2000-03-09
Benzoxazine derivative of the formula (I) in which, R1 is hydrogen, or a substituent, R?2 and R3¿ each independently are hydrogen or C¿1-6? alkyl, R?4¿ is C¿1-6? alkyl, C3-6 cycloalkyl, phenyl, C(=Y?1)Z1R8¿ or C(=Y1)R8, n is 0 or an integer of 1 to four, W is C=O or -CH¿2?-, X is -CONH-, -CH2NH-, -NHCONH- or -SO2NH-, Y is substituted or unsubstituted aryl or heterocyclyl and pharmaceutically acceptable salts thereof are useful as active ingredients for pharmaceutical compositions for curing cardiac insufficiency.