Synthetic vasopressin analog that acts as an agonist at V1B and V2 receptors (EC50 values are 11.4 and 23.9 nM and Ki values are 5.84 and 65.9 nM respectively). Prevents polycystic kidney disease formation and exhibits antidiuretic, antiproliferative, hemostatic and hypotensive activity in vivo. MW (observed): 1069.22.