Therefore, the closest chemical relative of ethylmorphine is codeine, also known as methylmorphine.

Codeine or methylmorphine is an opiate used for its analgesic properties.

Except for the demethylation of codeine (methylmorphine) to its active metabolite, their metabolic pathways do not become saturated.

Codeine (methylmorphine) 2.

Ecgonine, thebaine and their salts, benzylmorphine and the other ethers of morphine and their salts, except methylmorphine (codeine), ethylmorphine and their salts.