1,2-Benzisothiazolin-3-one, 2-(3-(dimethylamino)propyl)-, maleate 2-(3-(Dimethylamino)propyl)-1,2-benzisothiazolin-3-one maleate BU-310 maleate DE4192400 N-gamma-Dimethylaminopropyl-1,2-benzisothiazolone maleate