A benzopyran compound of the general formula (I) or pharmaceutically acceptable salt, wherein X is NR6 wherein R6 is H or C1-4 alkyl； Y is a bond, SO or SO2； Z is C1-4 alkyl group (wherein the C1-4 alkyl may be substituted with 1 to 5 halogen atoms or phenyl group (wherein the phenyl may be substituted with C1-4 alkyl group)) or phenyl group (wherein the phenyl may be substituted with C1-4 alkyl group)； W is H, OH, C1-6 alkoxy group (wherein the alkoxy group may be substituted with halogen atom), a halogen atom, C1-4 alkyl group or C1-6 alkylsulfonylamino group； R1 and R2 are methyl； R3 is OH group； m is an integer of 0 to 4； n is an integer of 0 to 4； V is a single bond； R4 is H and R5 is defined in the claims. A pharmaceutical composition comprising the benzopyran compound or pharmaceutically acceptable salt thereof as an active ingredient. These compounds are useful as an anti-arrhythmic agent.A benzopyran compound of the general formula (I) or pharmaceutically acceptable salt, wherein X is NR6 wherein R6 is H or C1-4 alkyl； Y is a bond, SO or SO2； Z is C1-4 alkyl group (wherein the C1-4 alkyl may be substituted with 1 to 5 halogen atoms or phenyl group (wherein the phenyl may be substituted with C1-4 alkyl group)) or phenyl group (wherein the phenyl may be substituted with C1-4 alkyl group)； W is H, OH, C1-6 alkoxy group (wherein the alkoxy group may be substituted with halogen atom), a halogen atom, C1-4 alkyl group or C1-6 alkylsulfonylamino group； R1 and R2 are methyl； R3 is OH group； m is an integer of 0 to 4； n is an integer of 0 to 4； V is a single bond； R4 is H and R5 is defined in the claims. A pharmaceutical composition comprising the benzopyran compound or pharmaceutically acceptable salt thereof as an active ingredient. These compounds are useful as an anti-arrhythmic agent.
