niconyl

例句：

1. 1. This compound is a key intermediate inthe synthesis of nicotinamide.
   这种化合物是合成烟酰胺的关键中间体。
2. 2. Theenzyme catalyzes the conversionof nicotinamide to nicotine.
   该酶催化烟酰胺转化为尼古丁。
3. 3. Nicotinamide is an essentialnutrient for humans and animals.
   烟酰胺是人类和动物必需的营养素。