4-(Dimethylamino)benzoic-2,3,5,6-d4 Acid

4-?(Dimethylamino)?benzoic-?2,?3,?5,?6-?d4 Acid is an intermediate in the synthesis of DMABA-d4 NHS Ester (D678402), which is a labelled DMABA NHS ester (D678400). DMABA NHS ester is a reagent that reacts with the primary amine group of PE lipids. DMABA NHS ester has been used in combination with DMABA NHS ester-d4, -d6, and -d10 to study relative changes in PE lipid abundance before and after radical oxidation.