Synonyms: C-Nor-7-oxamorphinan;5H-4,9b-(Iminoethano)naphtho[2,1-b]furan, 1,2,3a,4-tetrahydro-, [3aR-(3aa,4a,9ba)]-; Furano-6,7-benzomorphan, tetrahydro-;Tetrahydrofurano-6,7-benzomorphan; [3aR-(3aa,4a,9ba)]-1,2,3a,4-Tetrahydro-5H-4,9b-(iminoethano)naphtho[2,1-b]furan