<unk>  (WIN-7681) is a 4-phenylpiperidine derivative that is related to the opioid analgesic drug pethidine (meperidine).<unk>  is an analogue of pethidine where the N-methyl group has been replaced by allyl. In many other opioid derivatives, placing an allyl substituent on the nitrogen instead of a methyl will reverse the normal opioid effects, to produce μ-opioid antagonists which among other things reverse the respiratory depression caused by opioid agonists such as morphine. This is not true with<unk> , as while it does partially reverse the respiratory depression produced by morphine it is actually an active analgesic and has no antagonistic properties when administered alone, so is instead a partial agonist.
Allylnorpethidine
Ephedrine
Methoxyphedrine
N-Methylephedrine
Bethanechol chloride
Nomifensine
Glycopyrronium bromide
Guaifenesin