Abstract: Compounds of the formula ##STR1## wherein R is methyl or ethyl,R.sub.1 is methyl, ethyl or ##STR2## and R.sub.2 is methyl, ethyl, ##STR3## where Alk is alkyl of 1 to 4 carbon atoms,Q is ethyl, propyl, isopropyl or 2-hydroxy-propyl,A is 3-phenoxy-2-hydroxy-propyl, where the phenyl ring is substituted in the o-position by hydroxy, methoxy, n-hexyloxy or benzyloxy,B is alkyl of 1 to 4 carbon atoms, phenyl, p-methyl-phenyl, 3-phenyl-3-hydroxy-isopropyl or A, as defined above, andn is an integer from 2 to 6, inclusive,Provided, however, that one of R.sub.1 and R.sub.2 must be methyl or ethyl and the other has one of the other respective meanings indicated; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as the salts are useful as peripheral vasodilators.