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Reference.org
N-Phenethyl-4-piperidinone
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<p><i>N</i>-Phenethyl-4-piperidinone (NPP) is a derivative of <a href="/facts/4-Piperidinone/e4wn6DeW">4-piperidinone</a> with the <a href="/facts/Molecular_formula/hghUtthl">molecular formula</a> C13H17NO. It is used as an intermediate in the manufacture of chemicals and <a href="/facts/Pharmaceutical_drug/h9mhwWP2">pharmaceutical drugs</a> such as <a href="/facts/Fentanyl/MMD9GdD3">fentanyl</a>. </p><p>Because of its possible use in the illicit manufacture of fentanyl, the <a href="/facts/United_States/P0sCdLe5">United States</a> <a href="/facts/Drug_Enforcement_Administration/qGQpHNB8">Drug Enforcement Administration</a> (DEA) placed NPP under control as a <a href="/facts/DEA_list_of_chemicals/1S0FC05Y">List 1 Chemical</a> in 2007. Both domestic sales and domestic importations are thus subject to DEA reporting requirements. </p>