Used as a key intermediate in the synthesis of fluorescent dyes and biologically active compounds. Its structure supports conjugation in organic semiconductors and is employed in the development of sensors for biomolecules due to its electron-withdrawing nitro group and reactive aldehyde functionality. Also utilized in medicinal chemistry for constructing indole-based drug candidates, particularly in antiviral and anticancer research. The compound's photophysical properties make it suitable for studies in fluorescence labeling and imaging probes.