N-Phenethylnordesomorphine

N-Phenethylnordesomorphine is an opiate analgesic drug derived from desomorphine by replacing the N-methyl group with β-phenethyl. Since desomorphine is already around eight times more potent than morphine, the additional boost in binding affinity produced by using the larger phenethyl group makes N-phenethylnordesomorphine a highly potent analgesic drug, some 85 times more potent than morphine, and a similar strength to the closely related morphinan derivative phenomorphan.

Source: Wikipedia — N-Phenethylnordesomorphine (CC BY-SA 4.0)