Patent ID: 7399781

Claim:
An N-substituted beozothiophenesulfonamide derivative represented by formula (I): wherein R 1 represents a hydrogen atom, a halogen atom or a lower alkyl group; R 2 represents a lower alkyl group; R 3 and R 4 each may be the same or different and represents a hydrogen atom, a lower alkoxycarbonyl group, a lower alkylsulfonyl group, a benzoyl group, an acyl group having 1 to 4 carbon atoms, a lower alkoxy group, a lower alkoxycarbonylmethylthioacetyl group, a nitro group, —CONHR 6 in which R 6 represents a hydrogen atom, a lower alkoxycarbonylmethyl group, a carboxymethyl group or —CH(CH 2 OH)COOR 7 in which R 7 represents a hydrogen atom or a lower alkyl group, a hydroxy lower alkyl group, or a cyano group, provided that R 3 and R 4 are not hydrogen atoms at the same time; and R 5 represents a hydrogen atom, a lower alkoxy group or a lower alkyl group, except the compounds represented by formulae: or a pharmaceutically acceptable salt thereof.