Synonyms: | (4bS,8aR,9S)-3-methoxy-11-methyl-6,7,8,8a,9,10-hexahydro-5H-9,4b-(epiminoethano)phenanthrene;ent-14S-3-Methoxy-17-MethylMorphinan;Morphinan, 3-Methoxy-17-Methyl-, (9a,13a)-;Dextromethorphan EP Impurity D;Dextromethorphan Impurity 4(Dextromethorphan EP Impurity D);Dextromethorphan Impurity 4;Morphinan, 3-methoxy-17-methyl-, (9α,13α)-;(9α,13α)-3-Methoxy-17-methylmorphinan |