GtoPdb Ligand ID: 9286

Synonyms: (S,S)-1-[2-(dimethylamino)-3-(4-hydroxyphenyl)propyl]-3-(1-thiophen-3-ylpropan-2-yl)urea | (S,S)-21 [PMID: 27533032]
Compound class: Synthetic organic
Comment: PZM21 is a potent, selective μ opioid receptor agonist with bias towards G-protein (Gi) activation over β-arrestin 2 recruitment [1]. This provides a compound with reduced propensity to produce common opioid side effects whilst retaining analgesic activity. PZM21 is being used experimentally for its analgesic activity.
This compound is not in PubChem and its SMILES string does not retrieve any patent documents from SureChembl (late August 2016).
Compare this with oliceridine, a chemically unrelated μ opioid receptor G-protein biased agonist.
2D Structure
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Physico-chemical Properties
Hydrogen bond acceptors 4
Hydrogen bond donors 3
Rotatable bonds 10
Topological polar surface area 92.84
Molecular weight 361.18
XLogP 2.42
No. Lipinski's rules broken 0
Canonical SMILES CC(Cc1cscc1)NC(=O)NCC(N(C)C)Cc1ccc(cc1)O
Isomeric SMILES C[C@@H](Cc1cscc1)NC(=O)NC[C@@H](N(C)C)Cc1ccc(cc1)O
InChI InChI=1S/C19H27N3O2S/c1-14(10-16-8-9-25-13-16)21-19(24)20-12-17(22(2)3)11-15-4-6-18(23)7-5-15/h4-9,13-14,17,23H,10-12H2,1-3H3,(H2,20,21,24)/t14-,17-/m0/s1
Bioactivity Comments
In mouse experiments PZM21 produces significant analgesia but with markedly reduced side effects of constipation and respiratory depression compared to morphine [1].

PZM21 is selective for the μ opiod receptor over other GPCRs tested, and does not inhibit neurotransmitter transporters with high affinity [1]. It behaves as an antagonist of the κ opiod receptor (Ki 18nM). PZM21 inhibits hERG with IC50 2000-4000nM.
Selectivity at GPCRs
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Target Sp. Type Action Value Parameter Concentration range (M) Reference
μ receptor Hs Agonist Biased agonist 9.0 pKi - 1
pKi 9.0 (Ki 1.1x10-9 M) [1]
μ receptor Hs Agonist Biased agonist 8.3 pEC50 - 1
pEC50 8.3 (EC50 4.6x10-9 M) [1]
Description: In a Gi/o activation assay.