hydroxyethylamino, or alkoxy, such as methoxy or alkoxy, or aroxy, such as phenoxy or sulfophenoxy groups; 2-chlorobenzothiazole-5- or -6-carbonyl or -5- or -6-sulfonyl, 2-arylsulfonyl- or -alkylsulfonylbenzothiazole-5- or -6-carbonyl or -5- or -6-sulfonyl, such as 2-methylsulfonyl- or 2-ethoxysulfonylbenzothiazole-5- or 6-sulfonyl- or -carbonyl-, 2-phenylsulfonylbenzothiazole-5- or -6-sulfonyl or