The chemical name of terlipressin is triglycidyl lysine vasopressin. It is a new synthetic long-acting vasopressin preparation. It is a precursor drug with no activity. It is used as a chemical book by aminopeptidase in vivo. After removing three glycyl residues at its N-terminal, it slowly "releases" active lysine vasopressin. Therefore, terlipressin is equivalent to a storage library that can release lysine vasopressin at a stable rate.