申请人:——
公开号:US04876261A1
公开(公告)日:1989-10-24
A compound of the formula (I) or its salt and a process for producing the compounds; The compounds have the effect to dilate neophrovascular tracts; ##STR1## wherein ##STR2## represents the formula ##STR3## (wherein R.sup.4 is a hydrogen atom or lower alkylsulfonyl); R.sup.1 is hydrogen, lower alkyl, hydroxyl, halogen, amino, or lower acylamino; R.sup.2 is hydrogen, lower alkyl, hydroxyl, amino, or lower alkylsulfonylamino; R.sup.3 is hydrogen, lower, alkyl or hydroxyl; R is hydrogen or halogen; with the proviso that when R.sup.1 is hydroxyl, there is no case that all of R.sup.2, R.sup.3 and R are hydrogens, and further with the proviso that when R is hydrogen, A excludes ##STR4## or a salt thereof.
公式(I)或其盐的化合物及其制备方法;该化合物具有扩张新生血管的作用;其中##STR2##代表公式##STR3##(其中R.sup.4是氢原子或较低的烷基磺酰基); R.sup.1是氢、较低的烷基、羟基、卤素、氨基或较低酰基氨基; R.sup.2是氢、较低的烷基、羟基、氨基或较低的烷基磺酰胺基; R.sup.3是氢、较低的烷基或羟基; R是氢或卤素; 前提是当R.sup.1为羟基时,不存在所有的R.sup.2、R.sup.3和R都是氢的情况,进一步的前提是当R为氢时,A不包括##STR4##或其盐。