Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen, chlorine, hydroxyl, trifluoromethyl, methyl or methoxy, and R.sub.2 is hydrogen, alkyl of 1 to 2 carbon atoms or benzyl; And non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as the salts are useful as hypertensives.
                            公式为##STR1##的化合物,其中R.sub.1为氢、
氯、羟基、三
氟甲基、甲基或甲氧基,R.sub.2为氢、1到2个碳原子的烷基或苯甲基;以及其非毒性、药理学上可接受的酸盐;这些化合物和盐作为降压剂是有用的。