Compounds of the general formula (I): ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hydrogen atom, an alkyl group, a nitro group, a halogen atom or a group of the formula --NR.sub.4 R.sub.5 or --OR.sub.4 ; in which the groups R.sub.4 and R.sub.5 may be the same or different and each represent a hydrogen atom, or an alkyl, alkenyl or cycloalkyl group (which alkyl group may optionally be substituted by alkoxy, hydroxy, amino, alkylamino, dialkylamino or aryl groups) or R.sub.4 and R.sub.5 together with the nitrogen atom form a heterocyclic ring which may optionally contain additional hetero atoms, e.g. morpholino or piperazinyl; and R.sub.6 represents a hydrogen atom or an alkyl group. These compounds have biological activity, particularly in inhibiting the release of spasmogenic substances arising as a consequence of antigen-antibody reactions.
通式(I)的化合物:##
STR1## 其中R.sub.1,R.sub.2和R.sub.3可以相同或不同,每个代表
氢原子,烷基,硝基,卤素原子或式--NR.sub.4 R.sub.5或--OR.sub.4的基团; 其中基团R.sub.4和R.sub.5可以相同或不同,每个代表
氢原子,或烷基,
烯基或
环烷基(该烷基可以选择性地被烷
氧基,羟基,
氨基,烷基
氨基,二烷基
氨基或芳基取代)或R.sub.4和R.sub.5与
氮原子一起形成可能包含额外杂原子的杂环环,例如
吗啡环或
哌嗪基;而R.sub.6代表
氢原子或烷基。这些化合物具有
生物活性,特别是在抑制由抗原-
抗体反应引起的痉挛原性物质释放方面具有
生物活性。