A synthesis of the hitherto unreported L-serylglycylglycine by two different methods is described. N-carbobenzoxy L-serylglycylglycine benzyl ester, an intermediate in the preparation of the tripeptide, was found to be a suitable derivative in the synthesis of L-α-phosphatidyl L-serylglycylglycine
Baer, Erich; Maurukas, Jonas; and Clarke, Donald Dudley PhD, "L-serylglycylglycine / by Erich Baer, Jonas Maurukas, and Donald D. Clarke" (1956). Chemistry Faculty Publications. Paper 42.