Bromadoline (U-47931E)[1] is an opioid analgesic selective for the μ-opioid receptor[2] developed by the Upjohn company in the 1970s.

[3] The drug has a potency lying between that of codeine and morphine, being slightly stronger than pentazocine.

[4] Bromadoline is related to AH-7921 and U-47700.

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