There are described compounds of the formula ##STR1## where X is O or NR, R being hydrogen or loweralkyl; R.sub.1 is hydrogen; and R.sub.2 is loweralkyl, arylloweralkyl, aryloxyloweralkyl or loweralkyl substituted with ##STR2## or alternatively--NR.sub.1 R.sub.2 taken together is ##STR3## R.sub.3 being arylloweralkyl or a pharmaceutically acceptable acid addition salt thereof, which are useful as ocular or systemic antihypertensive agents. There are also described intermediate compounds having the formula ##STR4## where X is oxygen or NR, R being hydrogen or loweralkyl; and Y is --OCH.sub.3, --OH or ##STR5## as well as intermediate compounds of the formula ##STR6## where Z is oxygen, NOH or NNHR.sub.4, R.sub.4 being hydrogen or loweralkyl.
描述了具有以下
化学式的化合物:##STR1## 其中X为O或NR,R为氢或低碳基;R.sub.1为氢;R.sub.2为低碳基、芳基低碳基、芳氧基低碳基或被##STR2##取代的低碳基,或者--NR.sub.1 R.sub.2共同为##STR3##,其中R.sub.3为芳基低碳基或其药学上可接受的酸盐,可用作眼部或全身抗高血压剂。还描述了具有以下
化学式的中间体:##STR4## 其中X为氧或NR,R为氢或低碳基;Y为--OCH.sub.3、--OH或##STR5##,以及具有以下
化学式的中间体:##STR6## 其中Z为氧、NOH或NNHR.sub.4,R.sub.4为氢或低碳基。