<unk>  is a potent μ-opioid agonist with a distinctive chemical structure which is not closely related to other established families of opioid drugs. It was found to be around 591x more potent than morphine in animal studies.<unk>  has never been used in humans, but would be expected to produce effects similar to those of other potent opioid agonists, including strong analgesia, sedation, euphoria, constipation, itching and respiratory depression which could be harmful or fatal.
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