Abstract: Compounds useful in the prevention and/or treatment of hypertension, congestive heart failure, arrhythmia, migraine, vasospastic disorders, and asthma are represented by the formula ##STR1## wherein: R.sup.1 is ##STR2## wherein X is hydrogen, lower alkyl, lower alkoxy, halo, carboxamido or hydroxy; m is 1, 2 or 3; and n is 1, 2 or 3;R.sup.2, R.sup.3 and R.sup.4 are independently hydrogen or lower alkyl; andthe pharmaceutically acceptable acid addition salts thereof.

Abstract: Compounds useful in the prevention and/or treatment of hypertension, congestive heart failure, arrhythmia, migraine, vasospastic disorders, and asthma are represented by the formula: ##STR1## wherein:R.sup.1 is ##STR2##R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen or lower alkyl of one to four carbon atoms;X is hydrogen, lower alkyl of one to four carbon atoms, lower alkoxy of one to four carbon atoms or halo;m is 1 or 2; andn is 1, 2 or 3; andthe pharmaceutically acceptable acid addition salts thereof.

Abstract: Novel compounds of the formula: ##STR1## and the pharmaceutically acceptable acid addition salts thereof, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently hydrogen, hydroxy, lower alkyl, lower alkoxy or halo;R is hydrogen or lower alkyl; andA is selected from the group consisting of:2-(benzodioxan-2-yl)-2-hydroxyethyl;.omega.-(benzodioxan-2-yl)-alkyl (1-4);3-(aryloxy)-2-hydroxypropyl, wherein aryloxy is phenyloxy optionally substituted by 1-3 moieties selected from the group consisting of lower alkyl, lower alkoxy, halo, alkylsulfamido, lower alkoxycarbonyl, cyano and trifluoromethyl;.omega.-arylalkyl (1-4), wherein aryl is phenyl optionally substituted by 1-3 moieties selected from the group consisting of lower alkyl, lower alkoxy, halo, alkylsulfamido, lower alkoxycarbonyl, cyano and trifluoromethyl;.omega.-aryl-.omega.-oxoalkyl (1-4), wherein aryl is as herein defined;.omega.-aryl-.omega.-hydroxyalkyl (1-4), wherein aryl is as herein defined; and.omega.

Abstract: Compounds useful in the prevention and/or treatment of hypertension, congestive heart failure, arrhythmia, migraine, vasospastic disorders, and asthma are represented by the formula ##STR1## wherein: R, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen or lower alkyl of one to four carbon atoms; andR.sup.5 and R.sup.6 are independently hydrogen, lower alkyl of one to four carbon atoms or lower alkoxy of one to four carbon atoms; andthe pharmaceutically acceptable acid addition salts thereof.