Compounds of the formula ##STR1## wherein R.sub.1 is optionally substituted alkyl; R.sub.2 is hydrogen or optionally substituted alkyl; or R.sub.1 and R.sub.2, together with each other and the nitrogen atom to which they are attached, form an optionally substituted cyclic imino group; R.sub.3 is an optionally substituted cyclic imino group; and R.sub.4 is substituted hydroxyl, mercapto or amino; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as antithrombotics.
式子为 ##STR1## 的化合物,其中 R.sub.1 为可选取代的烷基;R.sub.2 为氢或可选取代的烷基;或 R.sub.1 和 R.sub.2 与它们所连接的氮原子一起形成可选取代的环状
亚胺基;R.sub.3 为可选取代的环状
亚胺基;R.sub.4 为取代羟基、巯基或
氨基的基团;以及其无毒、药理学上可接受的酸加盐。这些化合物及其盐可用作抗血栓剂。