Compounds of the formula ##STR1## wherein: R is hydrogen, chlorine, or fluorine; and R.sup.1 is hydrogen, methyl, ethyl, propyl, or isopropyl; or a non-toxic acid addition salt thereof; exert an anti-hypertensive effect.
式为##STR1##的化合物,其中:R为氢,
氯或
氟;R.sup.1为氢,甲基,乙基,丙基或异丙基;或其无毒酸盐;具有降压作用。