A compound of the formula ##STR1## wherein R.sup.1 is chlorine, bromine, or methoxy; and R.sup.2, R.sup.3, and R.sup.4 are individually hydrogen or methyl, at least one of R.sup.2, R.sup.3, and R.sup.4 being hydrogen; or R.sup.2 and R.sup.3 together are an ethylene group and R.sup.4 is hydrogen, or a pharmaceutically acceptable acid addition salt thereof. Such compounds are useful as anti-hypertensive agents. Methods of preparation and certain novel intermediates are also disclosed.
一种
化学式为##STR1##的化合物,其中R.sup.1是
氯、
溴或甲氧基;R.sup.2、R.sup.3和R.sup.4分别是氢或甲基,其中至少有一个是氢;或者R.sup.2和R.sup.3一起是一个
乙烯基且R.sup.4是氢,或其药用酸盐。这些化合物可用作降压药物。还公开了制备方法和某些新颖中间体。