The Emergence of a Novel Synthetic Nicotine Analog 6?Methyl Nicotine (6?MN) in Proclaimed Tobacco? and Nicotine?Free Pouches Available in Europe, Celine, Vanhee, Maarten Dill, , Tuenter Emmy, and Sophia Barhdadi , Drug Testing and Analysis, 08/2025, Volume 17, Issue 8, (2025)