Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. Its aldehyde and alkyne functional groups allow for versatile reactivity, such as in Wittig reactions, reductions, and click chemistry. Commonly employed in the development of bioactive molecules and functionalized aromatic compounds. Also utilized in the synthesis of certain natural product analogs and fluorescent probes due to its electron-rich aromatic structure and modifiable side chains.