Oxadiazolinone derivatives of the formula: ##STR1## wherein R represents alkyl of 1 through 4 carbon atoms, R.sub.1 represents halogen, alkyl of 1 through 4 carbon atoms, alkoxy of 1 through 4 carbon atoms or alkylthio of 1 through 4 carbon atoms, and R.sub.2 represents hydrogen, halogen, alkyl of 1 through 4 carbon atoms, alkoxy of 1 through 4 carbon atoms or alkylthio of 1 through 4 carbon atoms, are useful as anthelmintics.
式子:##STR1## 中,R代表1至4个碳原子的烷基,R.sub.1代表卤素、1至4个碳原子的烷基、1至4个碳原子的烷氧基或1至4个碳原子的烷
硫基,R.sub.2代表氢、卤素、1至4个碳原子的烷基、1至4个碳原子的烷氧基或1至4个碳原子的烷
硫基,可作为驱虫剂使用。