N-Fmoc-L-?alanine-13C3, 15N is a labeled compound of N-Fmoc-L-alanine (F619945) which is a protected form of L-Alanine (A481500). L-Alanine used to make in-vivo measurement of glucose and alanine metabolism in studies of patients with diabetes. L-Alanine is a non-essential amino acid for human development and is one of the 20 amino acids encoded by the genetic code.