Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in medicinal chemistry due to its indazole core, which is known for biological activity in signaling pathways. Also employed in the preparation of analogs for structure-activity relationship (SAR) studies. Its aldehyde functional group allows for easy derivatization, enabling the formation of imines, oximes, or alcohols to tailor molecular properties in drug design.