L-Aspartic acid dimethyl ester hydrochloride

L-Aspartic acid dimethyl ester hydrochloride (DAA) is an inhibitor of serine proteases, which are enzymes that break down other proteins. DAA inhibits the activity of these enzymes by forming a covalent bond with the serine residue in the active site of the enzyme. This inhibition prevents the breakdown of proteins and leads to inflammation in target tissues. L-Aspartic acid dimethyl ester hydrochloride is used to treat inflammatory bowel disease by inhibiting cathepsin B, a protease that is associated with this condition.