Used as a key intermediate in the synthesis of pharmaceuticals and biologically active compounds, particularly in the development of pyrrole-based drugs. It serves as a building block in the preparation of inhibitors targeting enzymes such as kinases and proteases. Its functional groups allow for easy modification in medicinal chemistry, enabling the creation of diverse compound libraries for drug discovery. Also applied in the synthesis of porphyrin analogs and dyes due to its aromatic and chelating properties.