L-Proline,1-[1-[1-[N-[N-[N-[1-[1-[1-[N-[N-(N-acetyl-L-valyl)-L-histidyl]-L-leucyl]-L-prolyl]-L-prolyl]-L-prolyl]-L-valyl]-L-histidyl]-L-leucyl]-L-prolyl]-L-prolyl]-
CAS No. 140685-98-9