For laboratory research requirements.

IUPAC: 5-nitro-2-[4-(2-propoxy)benzyl]-1-[2-(pyrrolidin-1-yl)ethyl]-1H-benzo[d]imidazole..

Isotonitazepyne (N-pyrrolidino isotonitazene) is a benzimidazole derivative with potent opioid effects. It has been identified by the drug checking service CanTEST, in Canberra Australia, and tentatively in New Zealand. It's in vitro potency is approximately 1000 times that of morphine. It is specifically listed as an illegal drug in the US state of Virginia.