Fmoc-b-(7-methoxy-coumarin-4-yl)-Ala-OH, 524698-40-6, C28H23NO7, Mr 485.49, 500mg. (S)-2-(Fmoc-amino)-3-(7-methoxy-2-oxo-2H-chromen-4-yl)-propionic acid, Fmoc-b-(O-methyl-umbellifer-4-yl)-Ala-OH. Fmoc-protected coumarinyl alanine derivative useful for the incorporation of a fluorescent label into a peptide sequence during solid (SPPS) or solution phase peptide synthesis.