"[DAla2] Dynorphin A (1-9) (porcine)" 是一种强效的肽类化合物，常用于疼痛、成瘾和抑郁研究。

Peptide E，作为kappa阿片受体激动剂，显示出显著的阿片受体结合活性，具IC50值为0.39 μM，适用于中枢神经系统研究。

N-Acetyl-α-Endorphin is a chemical compound consisting of α-Endorphin that has been acetylated at the N-terminal. α-Endorphin, in turn, is an endogenous opioid peptide.

DALDA 是一种强效和高选择性μ-opioid receptor 激动剂，其Ki 为 1.69 nM。 DALDA 具有抗痛和呼吸作用。

Orphanin FQ(1-11) is a peptide fragment containing amino acids 1-11 of Nociceptin. Orphanin FQ(1-11) is a potent agonist of the ORL1/KOR-3 receptor (Ki = 55 nM) and displays no affinity for opioid receptors, including μ, δ, κ1 and κ3 receptors (Ki >1000 nM). Orphanin FQ(1-11) displays analgesic properties in CD-1 mice.

High affinity ligand for the NOP site (Ki = 1.5 nM). Antagonizes nociceptin-stimulated GTP binding in rat brain and the chronotropic effect of nociceptin on rat cardiomyocytes. However, displays potent agonist properties in vivo, inhibiting locomotor acti

LY 281217, an organic opioid agonist, can produce analgesic effects in mice.

DPDPE 是选择性 δ-阿片受体激动剂肽，在体内具有镇痛作用。

Icalcaprant为κ阿片受体拮抗剂。