Product Code Pack Size Sterling Euros Dollars      33454  500mg  £80  €124  $164   L-Phenylalanine 7-amido-4-methylcoumarin trifluoroacetate salt L-Phenylalanine-AMC.TFA CAS: 108321-84-2 MF: C21H19F3N2O5 MW: 436.40 >98% [HPLC]. Free AMC < 100ppm. Fluorogenic aminopeptidase substrate: J. O'Donnell-Tormey and J.P. Quigley, Proc. Natl. Acad. Sci USA, 80, 344 (1983).