retinaldehyde

例句：

1. 1. The compound is a key intermediatein the synthesis of vitamin A.
   这种化合物是维生素A合成的关键中间体。
2. 2. Retinaldehyde is used as a preservativein food packaging.
   视黄醛用于食品包装的防腐剂。
3. 3. In recent years, scientists havediscovered new ways to synthesize retinaldehyde.
   近年来，科学家们发现了新的合成视黄醛的方法。