29 y/o M was complaining of the headache and collapsed abruptly. EMS was called and resuscitation was unsuccessful. It is actually noteworthy that U-47700 displays a lower binding affinity than morphine in equally rat and mouse MOR isoforms, still U-47700 has a much greater analgesic potency than morphine in both https://prosyntheticchems.com/product/u-48800/