| abstract |
Compounds of the formula <IMAGE> (I) and the pharmaceutically acceptable acid addition salts thereof, wherein: n is an integer equal to 0, 1, 2 or 3; R1 is hydrogen, lower alkyl, optionally substituted phenyl or optionally substituted phenyl lower alkyl; each R is independently hydrogen, lower alkyl, optionally substituted phenyl, or optionally substituted phenyl lower alkyl; are alpha 2 blockers, and, therefore, are useful in treating essential hypertension and depression, and in inhibiting platelet aggregation. |