3-Allylfentanyl
3-Allylfentanyl is an opioid analgesic that is an analogue of fentanyl.
3-Allylfentanyl has effects similar to fentanyl, although it is only 0.13x-0.14x as potent by weight.
The decreased potency of this analogue caused by the addition of the allyl group makes it somewhat less dangerous than fentanyl itself, although this is relative. For comparison, carfentanil is at least 20-30x as potent as fentanyl.