MDMB 4en PINACA is a synthetic cannabinoid that's been linked to sudden collapse, seizures, and fatal overdoses. It's often sprayed on herbal material and sold as Spice. Key risks: Potency varies wildly PDF) Overview of Synthetic Cannabinoids ADB FUBINACA and AMB FUBINACA: Clinical, Analytical, and Forensic Implications Synthetic cannabinoids in e liquids: A proton and fluorine NMR analysis from a conventional spectrometer to a compact one ScienceDirect Overview of Synthetic Cannabinoids ADB FUBINACA and AMB FUBINACA: Clinical, Analytical, and Forensic Implications Detection of some synthetic cannabinoids (FUB AMB and AB FUBINACA) in blood and urine using gas chromatography mass spectrometry liquidliquid extraction