Name: (4R,4aS,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-dihydroxy-3-methyl-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-3-ium-7-one,bromide
Alias: [14C]-N-Methylnaltrexone bromide; MNTX bromide; Naltrexone methobromide; (-)-naltrexone methyl bromide; Relistor;
CAS No.: 73232-52-7
Molecular formula: C21H26BrNO4
Molecular weight: 436.33900
Exact mass: 435.10500
PSA: 69.59000
LogP: 3.02510
Methylnaltrexone Bromide is a peripherally acting mu-opioid receptor antagonist used to treat opioid-induced constipation. Synthesized via N-methylation of naltrexone, its chemical formula is C21H26BrNO4 with CAS No. 137258-93-6.
Contraindicated in patients with suspected or confirmed gastrointestinal obstruction. Store at controlled room temperature (20-25°C) in tightly sealed containers away from moisture to maintain stability.