Patent ID: 7022732

Claim:
A 2-(S)-hydroxy-3-substituted propanolamine derivative having a 6-substituted 2,3-dihydro-1,4-benzodioxine ring wherein the 2-position is substituted with a carboxy group or a (C 1 –C 6 )alkoxycarbonyl group and is provided with R configuration, represented by formula (II): wherein R 1 is a (C 1 –C 6 )alkylsulfonamido group; and R 2 and R 3 may be the same or different and each represents a hydrogen atom, a (C 1 –C 6 )alkoxy group, a (C 1 –C 6 )alkoxy (C 1 –C 6 )alkoxy group, a hydroxy group, a (C 1 –C 6 )alkylsulfonamido group or an amino group, R 4 represents a hydrogen atom or a (C 1 –C 6 )alkyl group, R 5 represents a hydrogen atom or a (C 1 –C 6 )alkyl group, and A represents a benzene ring, or a pharmacologically acceptable salt thereof.