N-[(1,1-Dimethylethoxy)carbonyl]-L-homoserine 1,1-Dimethylethyl Ester Methanesulfonate is an intermediate in synthesizing L-Methionine-34S (M260443). It is a labelled L-Methionine, an essential aminoacid for human development. Hepatoprotectant; antidote (acetominophen poisoning); urinary acidifier.