(5a)-(5'a)-17,17'-Bis(cyclopropylmethyl)-4,5:4',5'-diepoxy-3,3',14,14'-tetrahydroxy-[2,2'-bimorphinan]-6,6'-dione;2,2'-Bisnaltrexone (Naltrexone Impurity);Naltrexone Impurity;Pseudonaltrexone
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