H-Val-Ala-OH-13C5,15N (Valyl-alanine-13C5,15N) TFA is the 13C- and 15N-labeled H-Val-Ala-OH (HY-W007035). H-Val-Ala-OH (Valyl-alanine) is a dipeptide formed from L-Valine and L-Alanine residues. H-Val-Ala-OH has a role as a metabolite and also has a bitter taste[1][2].