(5alpha,8beta)-6,7-Didehydro-4,5-epoxy-3-methoxy-17-methylmorphinan-8-ol 466-96-6 EINECS 207-380-9 Morphinan-8-beta-ol, 6,7-didehydro-4,5-alpha-epoxy-3-methoxy-17-methyl- Neoisocodeine Pseudocodeine psi-Codeine