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β-Hydroxythiofentanyl
go.drugbank.com/drugs/DB09170ExperimentalIllicitThis drug is an analog of fentanyl, a potent opioid.
Butyrfentanyl
go.drugbank.com/drugs/DB09173ExperimentalIllicit[L7811] This compound is a schedule I controlled substance in the USA because it is a positional isomer of 3-Methylfentanyl. … [L7811] Butyrfentanyl was first synthesized in 1961 by Janssen Pharmaceuticals as a new opioid analgesic.
Mirfentanil
go.drugbank.com/drugs/DB09175ExperimentalMirfentanil is a derivative of fentanyl that presents high selectivity for the mu opioid receptor.
Phenaridine
go.drugbank.com/drugs/DB09178ExperimentalIllicitPhenaridine (2,5-Dimethylfentanyl) is a synthetic fentanyl derivative opioid. It was developed in 1972, and is used for surgical anasthesia in Russia. Phenaridine has similar effects to fentanyl.
Thienylfentanyl
go.drugbank.com/drugs/DB09180ExperimentalIllicitThienylfentanyl has a similar synthesis pathway to fentanyl except 2-(2-bromoethyl)thiophene is substituted for phenethyl bromide. … Thienylfentanyl is a fentanyl analog analgesic that was sold on the black market in the 1980s until the Federal Analog Act scheduled drugs based on structural similarity rather than scheduling drugs individually
Benzylfentanyl
go.drugbank.com/drugs/DB09182ExperimentalIllicitBenzylfentanyl has a Ki of 213nM at the mu opioid receptor, binding around 200x less strongly than fentanyl itself. … Benzylfentanyl (R-4129) is a fentanyl analog opioid that was on the list of Schedule I drugs in America in 1985 due to its structural similarity to fentanyl.
Nisoxetine
go.drugbank.com/drugs/DB09186ExperimentalNisoxetine is a selective norepinephrine reuptake inhibitor (SNRI) developed in the 1970s. … It was originally investigated as an antidepressant but has no current clinical applications aside from being a research standard SNRI.
Talopram
go.drugbank.com/drugs/DB09190ExperimentalTalopram is a selective norepinephrine reuptake inhibitor (SNRI) that is structurally similar to citalopram and melitracen. It was researched in the 1960s and 1970s but never marketed.
Talsupram
go.drugbank.com/drugs/DB09191ExperimentalTalsupram presents a similar structure to [citalopram]. … Talsupram is a selective norepinephrine reuptake inhibitor (NRI). It was under research for the treatment of depression in 1960 and 1970 but it was never marketed.
Mepiprazole
go.drugbank.com/drugs/DB09197ExperimentalMepiprazole is a minor tranquilizer with a phenylpiperazine structure. It is a pyrazolyl-alkyl-piperazine derivative. … Mepiprazole mediates a weak inhibitory action on the uptake of 5-HT on hypothalamic neurons [A7816]. Mepiprazole is marketed in Spain for the treatment of anxiety neuroses.