A 1,2,4-oxadiazole derivative having the formula:
wherein A is a methine group or a nitrogen atom; R₁ is a chlorine atom or a methyl group; when A is a methine group, R₂ is a hydrogen atom if R₁ is a methyl group, and a hydrogen atom or a methyl group if R₁ is a chlorine atom, and when A is a nitrogen atom, R₂ is a hydrogen atom; R₃ is a hydrogen atom, an alkyl group having from 1 to 11 carbon atoms, a benzyl group unsubstituted or substituted by chlorine or methoxy; a phenoxymethyl group unsubstituted or substituted by chlorine or methyl, or a lower alkoxyalkyl group.
一种 1,2,4-噁二唑衍
生物,其式如下
其中 A 是甲基或氮原子;R₁ 是
氯原子或甲基;当 A 是甲基时,如果 R₁ 是甲基,则 R₂ 是氢原子;如果 R₁ 是
氯原子,则是氢原子或甲基;当 A 是氮原子时,R₂ 是氢原子;R₃ 是氢原子、具有 1 至 11 个碳原子的烷基、未被
氯或甲氧基取代或取代 的苄基、未被
氯或甲基取代或取代的苯氧基甲基或低级烷氧基烷基。