Cyclic octapeptide somatostatin analog (Ki values are 0.7, 5.4, 30.9, 45 and > 1000 nM for sst5, sst2, sst3, sst4 and sst1 receptors respectively). More metabolically stable than somatostatin (Cat. No. 1157). Inhibits growth hormone release in vivo. MW (observed): 1131.37.