Novel compounds of the formula: ##STR1## are disclosed with the corresponding hydrates and pharamceutically acceptable acid addition salts thereof, wherein R.sub.1 is halogen, lower alkyl, or trifluoromethyl; R.sub.2 is lower alkyl, substituted or unsubstituted phenyl or benzyl and R.sub.3 is hydrogen. The novel compounds are useful for the treatment of hypertension and anxiety in mammals, including humans.Disclosed also are compositions containing the novel compounds of the invention and methods of their use in the treatment of hypertension and anxiety.