| abstract |
Compounds of formula (I), wherein R is a 3-chloro group, a 3- or 4-bromo group, a 4-fluoro group, a 4-trifluoromethyl group, a 2-alkoxy group having 1-4 carbon atoms, a 4-alkoxy group having 1-4 carbon atoms, a 4-hydroxy group, a 2-alkyl group having 1-4 carbon atoms, or a 4-alkyl group having 1-4 carbon atoms; and pharmaceutically acceptable acid addition salts thereof. The compounds are therapeutically useful as sedatives. |