The present invention relates to novel compounds of the general formula: ##STR1## wherein X represent an oxygen atom or a sulfur atom and R represents a hydrogen atom or an alkyl group of 1-4 carbon atoms, and non-toxic salts thereof when R represents a hydrogen atom, possessing an inhibitory effect on cerebral edema.
本发明涉及一种新型化合物,其通式为:##STR1## 其中X代表氧原子或
硫原子,R代表氢原子或1-4个碳原子的烷基,当R代表氢原子时,其非毒性盐具有抑制脑
水肿的作用。