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MDMB-4en-PINACA (also sometimes written as 4en-PINACA) is a synthetic cannabinoid receptor agonist (SCRA) —for laboratory research. 99% pure powder form, lab‑tested for research applications only.

Chemical Details:

• MDMB-4en-PINACA Full chemical name: methyl 3,3-dimethyl-2-(1-(pent-4-en-1-yl)-1H-indazole-3-carboxamido)butanoate
• Class: Indazole-3-carboxamide synthetic cannabinoid
• Structural features:
  
  • An indazole core (common to many modern SCRAs like ADB-PINACA, MDMB-CHMICA)
  • A pent-4-enyl (terminal alkene) tail on the indazole nitrogen — the "4en" in the name
  • A tert-leucine methyl ester head group (the "MDMB" portion: methyl ester of 3,3-dimethylbutanoate)

Pharmacology:

• Acts as a potent full agonist at the CB1 (and CB2) cannabinoid receptors, with affinity substantially higher than Δ9-THC.
• Produces cannabis-like effects but with much greater potency, which is a key reason SCRAs of this class have been linked to severe adverse events.