6-O-Methyldihydromorphine 7732-92-5 DEA No. 9304 Dihydro-6-O-methylmorphine Dihydroheterocodeine Methyldihydromorphine Morphinan-3-ol, 4,5-alpha-epoxy-6-alpha-methoxy-17-methyl- Morphinan-3-ol, 4,5-epoxy-6-methoxy-17-methyl-, (5alpha,6alpha)-