β-Casomorphin, human TFA (Human β-casomorphin 7 TFA) is an opioid peptide, acts as an agonist of opioid receptor.

β-Casomorphin, bovine TFA (β-Casomorphin-7 (bovine) TFA) is a opioid peptide with an IC50 of 14 μM in an Opioid receptors binding assay.

Hecogenin acetate is a steroidal sapogenin-acetylated with anti-inflammatory and antinociceptive. Hecogenin acetate shows potential antihyperalgesic activity, inhibiting descending pain and acting in opioid receptors.

Naloxone benzoylhydrazone (NalBzoH) is a mixed agonist/antagonist. Naloxone benzoylhydrazone is a prototypic κ3-opioid receptor agonist, and a partial agonist at the cloned μ and δ opioid receptors, and an antagonist at opioid-like NOP receptors. Naloxone benzoylhydrazone has potently analgesia effect.

JTC-801 is a selective opioid receptor-like1 (ORL1) receptor antagonist with IC50 of 94 nM, weakly inhibits receptors δ, κ, and μ.

NFEPP is a novel potent, selective pH-dependent μ-opioid receptor (MOR) agonist with a low pKa, shows significantly lower affinity compared with fentanyl at pH 7.4.

JDTic 2Hcl is a highly selective antagonist for the κ-opioid receptor; without affecting the μ- or δ-opioid receptors.

BU09059 is a potent, selective, short-acting kappa-opioid receptor antagonist with Ki of 1.72 nM, displays 15- and 616-fold selectivity over μ- and δ-receptors respectively.

Alvimopan(LY 246736; ADL 8-2698) is a peripherally acting mu-opioid receptor (PAM-OR, IC50= 1.7 nM) antagonist for accelerating gastrointestinal recovery after surgery.

Alvimopan(LY 246736; ADL 8-2698) is a peripherally acting mu-opioid receptor (PAM-OR, IC50= 1.7 nM) antagonist for accelerating gastrointestinal recovery after surgery.