indylidene

例句：

1. 1.The compound has a unique chemical structure and exhibits interesting photochromic properties.
   这种化合物具有独特的化学结构和有趣的光致变色性质。
2. 2. The researcher found that the presence of indylidene in the sample could be due to contamination during synthesis.
   研究人员发现样本中吲哚二烯的存在可能是由于合成过程中的污染所致。
3. 3. Indylidene is a key intermediate in the synthesis of many pharmaceutical drugs.
   吲哚二烯是合成许多药物的重要中间体。