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Reference.org
Tetramethylcyclopropylfentanyl
open-in-new
<p>Tetramethylcyclopropylfentanyl is an <a href="/facts/Opioid/EGnE2x99">opioid</a> <a href="/facts/Analgesic/xLj4XBcq">analgesic</a> that is an <a href="/facts/Structural_analog/3aysWSVG">analog</a> of <a href="/facts/Fentanyl/MMD9GdD3">fentanyl</a> and has been sold as a <a href="/facts/Designer_drug/QWFd3KV4">designer drug</a>. </p>