N-Methyl 6-Oxo Naltrexone Bromide

N-Methyl 6-Oxo Naltrexone Bromide is an intermediate used in the synthesis of (4R,4aS,6S,6aR,11bS)-6-Carboxy-3-(cyclopropylmethyl)-1,2,3,4,4a,5,6,6a-octahydro-4a,6,8-trihydroxy-3-methyl-4,11-methanobenzofuro[3',2':2,3]cyclopenta[1,2-c]pyridinium Bromide (C176950), which is an impurity/degradation of N-methyl Naltrexone (M320350), a metabolite of Naltrexone (N285750).