恶唑啉是一种含氧原子和氮原子的五元杂环化合物.它可能最早合成于1884年,但直到5年后,西格蒙·加布里埃尔才正确地指定了这种结构.它与Hantzsch–Widman命名法一致,是一族杂环化合物的一部分,在饱和度方面它存在于噁唑和噁唑烷之间.
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