Benzothiazolesulfonamide derivative, method for preparing the same, and use thereof

Abstract From the Canadian patent

Disclosed are a benzothiazolesulfonamide derivative represented by the formula (I) or a pharmaceutically acceptable acid addition salt thereof, (see fig. I) (I), wherein A represents a lower alkylene group which is unsubstituted or substituted; R1 represents a hydrogen atom or a lower alkyl group; each of R2 and R3 independently represents a hydrogen atom or a lower alkyl group or R2 and R3 are bonded to each other to form a lower alkylene group which is unsubstituted or substituted; and R4 represents a hydrogen atom, a lower alkyl group an, amidino group, or a phenyl-substituted lower alkyl group wherein the lower alkyl group is substituted or unsubstituted, and the phenyl group is …