N-desmethyl-N-carboethoxycodeine

N-(ethoxycarbonyl)norcodeinone

N-(ethoxycarbonyl)norcodeinone pyrrolidine dienamine

ethyl (4R,4aS,5S,7aR,12bS)-4a,5-dihydroxy-9-methoxy-7-oxo-1,2,4,4a,5,6,7,7a-octahydro-3H-4,12-methanobenzofuro[3,2-e]isoquinoline-3-carboxylate

ethyl (1R,4aS,9aR,10aR,11aS,11bS)-11b-hydroxy-8-methoxy-10-oxo-1,3,4,9a,10,10a,11a,11b-octahydro-2H-1,5-methanobenzofuro[3,2-e]oxireno[2,3-h]isoquinoline-2-carboxylate