Substituted benzopyrans of the formula ##STR1## in which --A-- is a single or double bond, X is a direct bond, optionally substituted methylene, oxygen or optionally substituted --NH--, and the various other radicals can have various meanings, or pharmaceutically acceptable addition salts thereof, which possess anti-hypertensive activity.
具有抗高血压活性的公式为##STR1##的取代苯并
吡喃或其药学上可接受的盐,其中--A--是单键或双键,X是直接键,可选取代亚甲基,氧或可选取代的--NH--,其他各种基团可以具有各种含义。