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The structure-activity relationship of the drug class has been explored to a reasonable extent. The optimal substitution pattern is fairly tightly defined (i.e. N,N-diethyl on the amine nitrogen, 4-ethoxy on the benzyl ring and 5-nitro on the benzimidazole ring), but even derivatives incorporating only some of these features are still potent opioids.
Etonitazene, also known as EA-4941 or CS-4640, [2] is a benzimidazole opioid, first reported in 1957, [3] that has been shown to have approximately 1,000 to 1,500 times the potency of morphine in animals.
Methylenedioxynitazene (3',4'-Methylenedioxynitazene) is a benzimidazole derivative which has been sold as a designer drug over the internet and presumably has opioid effects. It is an analogue of etonitazene where the benzyl ring is substituted with a 3,4-methylenedioxy ring system rather than an ethoxy group. It was first reported in the UK ...
Benzimidazole is a base: C 6 H 4 N(NH)CH + H + → [C 6 H 4 (NH) 2 CH] + It can also be deprotonated with stronger bases: C 6 H 4 N(NH)CH + LiH → Li [C 6 H 4 N 2 CH] + H 2. The imine can be alkylated and also serves as a ligand in coordination chemistry. The most prominent benzimidazole complex features N-ribosyl-dimethylbenzimidazole, as ...
Butonitazene is a benzimidazole derivative with opioid effects, which has been sold over the internet as a designer drug.It has relatively low potency compared to many related compounds, and has generally been encountered as a component of mixtures with other substances rather than in its pure form.
Maximum pesticide residue limits (MRLs) for fresh produce in the EU are between 0.1 and 0.7 mg/kg with the exception of loquat fruits, which is set at 2 mg/kg. [8] The limits for more commonly consumed citrus and pome fruits are between 0.1 and 0.2 mg/kg. Use of this fungicide on macadamia plantations has proven controversial in Queensland. [4]
Etomethazene (5-methyldesnitroetonitazene, 5-methyl etodesnitazene, Eto) is a benzimidazole derivative with opioid effects which has been sold as a designer drug over the internet since 2022, first being definitively identified in Sweden in January 2023.
It is the mercaptan of benzimidazole. It is a white solid that has been investigated as a corrosion inhibitor . The name is a misnomer because the compound is a thiourea , characterized with a short C=S bond length of 169 pm. [ 1 ] A similar situation applies to 2-mercaptoimidazole, which is also a thiourea properly called 2-imidazolidinethione ...