There are described compounds of the formula
where X is O or NR, R being hydrogen or loweralkyl; R, is hydrogen; and R2 is loweralkyl, arylloweralkyl, aryloxylo- weralkvl or loweralkvl substituted with
or alternatively -NR1R2 taken together is
R3 being arylloweralkyl or a pharmaceutically acceptable acid addition salt thereof, which are useful as ocular or systemic antihypertensive agents.
所述化合物的
化学式为
其中 X 是 O 或 NR,R 是氢或低级烷基;R,是氢;R2 是低级烷基、芳基低级烷基、芳氧基低级烷基或被下列物质取代的低级烷基
或者-NR1R2合起来是
R3 为芳基低级烷基或其药学上可接受的酸加成盐,可用作眼部或全身降压药。