2-Coumaranone-1-L serves as a chemiluminescent probe. Under alkaline conditions and in the presence of oxygen, 2-Coumaranone-1-L is capable of undergoing chemiluminescence, which enables its application as a chemiluminescent substrate in biochemical assays. 2-Coumaranone-1-L exhibits its maximum emission wavelength at 442 nm. 2-Coumaranone-1-L is utilized in research within the realm of bioanalysis.