AT-076

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AT-076
AT-076 structure.png
Systematic (IUPAC) name
(3R)-7-hydroxy-N-[(2S)-1-[4-(3-hydroxyphenyl)piperidin-1-yl]-3-methylbutan-2-yl]-1,2,3,4-tetrahydroisoquinoline-3-carboxamide
Identifiers
PubChem CID 91938095
Chemical data
Formula C26H35N3O3
Molar mass 437.58 g·mol−1
3D model (Jmol) Interactive image

AT-076 is a so-called opioid "pan" antagonist and is the first reasonably balanced antagonist known of all four opioid receptor types.[1] It acts as a silent antagonist of all four of the opioid receptors, behaving as a competitive antagonist of the μ-opioid receptor (Ki = 1.67 nM) and δ-opioid receptor (Ki = 19.6 nM) and as a noncompetitive antagonist of the κ-opioid receptor (Ki = 1.14 nM) and nociceptin receptor (Ki = 1.75 nM).[1] AT-076 was derived from the selective κ-opioid receptor antagonist JDTic via removal of the 3,4-dimethyl group of the trans-(3R,4R)-dimethyl-4-(3-hydroxyphenyl)piperidine antagonist scaffold, which increased affinity for the nociceptin receptor by 10-fold and for the μ- and δ-opioid receptors by 3-6-fold.[1]

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