The invention provides compounds of formula: ##SPC1## Wherein each of the groups R.sub.1 and R.sub.2, which may be the same or different, is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms and R.sub.3 is a hydrogen or halogen atom, an alkyl group having 1 to 3 carbon atoms or a methoxy, trifluoromethyl or nitro group. The compounds are useful for inducing hypothrombinaemia.
本发明提供了式子为:##
SPC1## 的化合物,其中R.sub.1和R.sub.2两个基团可以相同也可以不同,分别为氢原子或者有1到3个碳原子的烷基基团,R.sub.3为氢原子、卤素原子、有1到3个碳原子的烷基基团、甲氧基、三
氟甲基或者硝基。这些化合物可用于诱导低凝血素血症。