Semax is a synthetic heptapeptide derived from the adrenocorticotropic hormone (ACTH) fragment 4-10 with modifications. With the molecular formula C₃₇H₅₁N₉O₁₀ and a molecular weight of 812.9 g/mol (CAS: 80714-61-0), Semax consists of the sequence Met-Glu-His-Phe-Pro-Gly-Pro with an N-terminal proline and C-terminal glycine-proline added.
Pro-Gly-Pro-Glu-His-Phe-Met


