N-tert-Butoxycarbonyl-L-serine Methyl Ester is a derivative of L-Serine Methyl Ester Hydrochloride (S271005) derivative. N-tert-Butoxycarbonyl-L-serine Methyl Ester is an amino acid derivative used in the preparation of Tn antigen, L-glutamic acid p-nitroanilide analogs and new biomedical polymers having Serine and Threonine side groups.