7-Methoxycoumarin-4-acetic acid

White powder. Soluble in DMF (50 mg/ml), acetone or DMSO. Florescent probe that is commonly used as a building block to synthesize coumarin-type fluorescent probes. Spectral data: lambdaex 320 nm, lambdaem 380 nm in methanol. It is used as a fluorescent label for peptides. It is widely used for developing FRET peptide substrates for analyzing protease activities and for HPLC derivatization by fluorescence detection.