The invention provides novel esters of 7-hydroxycoumarin of the formula ##STR1## in which each of R.sub.1 and R.sub.2 represents a hydrogen atom, a C.sub.1 -C.sub.4 alkyl, C.sub.2 -C.sub.4 alkenyl, carboxy, carboxylate, C.sub.2 -C.sub.5 alkoxycarbonyl or nitrophenyl group, and R.sub.3 represents a hydrogen atom or a group of the formula --CH.sub.2 --Z in which Z represents a di(C.sub.1 -C.sub.4 alkyl)amino group, or a saturated heterocyclic amino radical containing 5 to 7 ring members which may contain a further heteroatom, and their pharmaceutically acceptable acid addition salts. The compounds are useful as medicaments, in particular as analgesics.
该发明提供了新型7-羟基
香豆素的
酯类化合物,其
化学式为##STR1##其中R.sub.1和R.sub.2分别代表氢原子,C.sub.1 -C.sub.4烷基,C.sub.2 -C.sub.4烯基,羧基,
羧酸酯,C.sub.2 -C.sub.5烷氧羰基或
硝基苯基;R.sub.3代表氢原子或具有--CH.sub.2 --Z的基团,其中Z代表二(C.sub.1 -C.sub.4烷基)
氨基基团,或含有5到7个环成员的饱和杂环
氨基基团,其中可能含有进一步的杂原子,以及它们的药用可接受的酸盐。这些化合物可用作药物,特别是作为
镇痛药。