Morphinan-7-carboxamide, 17-(cyclopropylmethyl)-6,7-didehydro-4,5-epoxy-3,6,14-trihydroxy-N-[1-methyl-1-(3-phenyl-1,2,4-oxadiazol-5-yl)ethyl]-, (5α)-, 4-methylbenzenesulfonate (1:1)

Naldemedine (S-297995) tosylate is an orally active μ-opioid receptor antagonist (PAMORA)[1]. Naldemedine tosylate shows potent binding affinities (Ki=0.34, 0.43, 0.94 nM, respectively) and antagonist activities (IC50=25.57, 7.09, 16.1 nM, respectively) for recombinant human μ-, δ-, and κ- opioid receptors[2]. Naldemedine can be used in opioid-induced constipation (OIC) research[2]. Naldemedine tosylate is predicted to bind to 3CLpro encoded by SARS-CoV2 genome[3].

μ Opioid Receptor/MOR

[1] Hannah A. Blair. Naldemedine: A Review in Opioid-Induced Constipation. Drugs. 2019 Jul;79(11):1241-1247. DOI:10.1007/s40265-019-01160-7
[2] Toshiyuki Kanemasa, et al. Pharmacologic effects of naldemedine, a peripherally acting μ-opioid receptor antagonist, in in vitro and in vivo models of opioid-induced constipation. Neurogastroenterol Motil. 2019 May;31(5):e13563. DOI:10.1111/nmo.13563
[3] Sugandh Kumar, et al. Identification of multipotent drugs for COVID-19 therapeutics with the evaluation of their SARS-CoV2 inhibitory activity. Comput Struct Biotechnol J. 2021;19:1998-2017. DOI:10.1016/j.csbj.2021.04.014