Compounds of formula (I): ##STR1## [in which: either (a) the dotted line ( ) is a single bond; A=is oxygen; and B is a group of formula (II): ##STR2## (in which m is 0 and n is 0 or 1) or (b) the dotted line ( ) is a double bond; A=is said group of formula (II) in which m is 1 and n is 0 or 1; and B is absent; and R.sup.1 is hydrogen, halogen, alkyl, alkenyl, alkynyl, optionally substituted benzyl or optionally substituted phenyl; R.sup.2 is hydrogen, halogen, alkyl, optionally substituted phenyl or heterocyclic; or R.sup.1 and R.sup.2, together with the carbon atoms to which they are attached, are a hydrocarbon ring fused to the isoxazole ring; R.sup.3 and R.sup.4 are each hydrogen, alkyl, optionally substituted benzyl or optionally substituted phenyl; or R.sup.3, R.sup.4 and the nitrogen atom to which they are attached together represent an alicyclic amino group]; and salts thereof may be used for the treatment of cerebral circulatory problems and for use as centrally acting muscle relaxants.
式(I)的化合物:##STR1## [其中:要么(a)虚线( )是单键;A为氧;B是式(II)的基团:##STR2## (其中m为0,n为0或1);要么(b)虚线( )是双键;A为式(II)中m为1,n为0或1的基团;B不存在;R^1为氢,卤素,烷基,烯基,炔基,可选取代苄基或可选取代苯基;R^2为氢,卤素,烷基,可选取代苯基或杂环基;或R^1和R^2与它们所连接的碳原子一起构成与
异噁唑环融合的碳氢环;R^3和R^4分别为氢,烷基,可选取代苄基或可选取代苯基;或R^3、R^4和它们所连接的氮原子一起表示脂环
氨基基团];以及它们的盐可用于治疗脑循环问题和作为中枢作用肌肉松弛剂。