https://erowid.org/pharms/fentanyl/ https://erowid.org/pharms/fentanyl/ So, i've been trying to do some digging. It seems that this is the precursor to fentyny

https://erowid.org/pharms/fentanyl/ https://erowid.org/pharms/fentanyl/ So, i've been trying to do some digging. It seems that this is the precursor to fentynyl https://pubchem.ncbi.nlm.nih.gov/compound/1-Benzyl-4-piperidone https://pubchem.ncbi.nlm.nih.gov/compound/1-Benzyl-4-piperid... According to these syntheses. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0108250 https://journals.plos.org/plosone/article?id=10.1371/journal... https://www.sciencedirect.com/topics/chemistry/fentanyl https://www.sciencedirect.com/topics/chemistry/fentanyl Finding the precursor to N-Benzyl-4-piperidone was difficult but it seems to be partially this. https://m.chemicalbook.com/ChemicalProductProperty_EN_CB9343629.htm https://m.chemicalbook.com/ChemicalProductProperty_EN_CB9343... Which is https://www.spectrumchemical.com/OA_HTML/chemical-synonym_4-4-Piperidinediol-Hydrochloride.jsp?pSynonym=4,4-Piperidinediol-Hydrochloride https://www.spectrumchemical.com/OA_HTML/chemical-synonym_4-... >is a derivative of piperidine used as an intermediate in manufacturing pharmaceutical drugs and chemicals Which comes from black pepper https://en.m.wikipedia.org/wiki/Piperidine https://en.m.wikipedia.org/wiki/Piperidine