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Furanylfentanyl (Fu-F) is an opioid analgesic that is an analog of fentanyl
 and has been sold as a designer drug.
 It has an ED50 value of 0.02 mg/kg in mice.
 This makes it approximately five times less potent than fentanyl.
(4)Side effects of fentanyl analogs are similar to those of fentanyl itself, which include itching, nausea and potentially serious respiratory depression, which can be life-threatening. Fentanyl analogs have killed hundreds of people throughout Europe and the former Soviet republics since the most recent resurgence in use began in Estonia in the early 2000s, and novel derivatives continue to appear.
Life-threatening adverse reactions caused by furanylfentanyl use have been observed in Sweden and Canada.
 At least seven deaths in Cook County, Illinois, have been linked to furanylfentanyl in 2016, with additional deaths in suburban Chicago in 2017.
* U 47700
U-47700 is an opioid analgesic drug developed by a team at Upjohn in the 1970s that acts as a selective agonist of the µ-opioid receptor with a Kd value of 5.3 nM compared to 910 nM for the κ-opioid receptor and has around 7.5 x the potency of morphine in animal models.
U-47700 is a structural isomer of the earlier opioid AH-7921 and the result of a great deal of work elucidating the quantitative structure–activity relationship of the scaffold. Upjohn looked for the key moieties which gave the greatest activity and posted over a dozen patents on related compounds, each optimizing one moiety until they discovered that U-47700 was the most active.
U-47700 became the lead compound of selective kappa-opioid receptor ligands such as U-50488, U-51754 (containing a single methylene spacer difference) and U-69,593, which share very similar structures.Although not used medically, the selective kappa ligands are used in research.
bk-epdp(crystal) is the newest research chemical which is similar with ethylone, it was thought to be analog of ethylone and methylone.The physiologic
bk-epdp(crystal) is the newest research chemical which is similar with ethylone, it was thought to be analog of ethylone and methylone.The physiological and toxicological properties of ephylone(crystal) are not known yet.It is available for sale as a grey area research chemical.
Dibutylone also known as bk-DMBDB with the IUPAC name being 1-(1,3-Benzodioxol-5-yl)-2-(dimethylamino)butan-1-one is related to mt compound. The compound is often classified in research chemical field.
The molecular formula is C13H17NO3 with formula weight of 271.7, a molecular weight of 235.28, a monoisotopic mass of 235.120843 and is a crystalline solid with a purity of ≥98%. The chemical should be stored at chilled environment which will give allow the chemical to stay stable and have a longer life span. The CAS number is 802286-83-5.
According to Cayman Chemical research the product is a crystalline solid that can be dissolved in a variety of solvents. It is usually dissolved in organic solvents such as dimethyl formamide, ethanol, and DMSO and should always be purged with an inert gas. The solubility found in ethanol is 0.3, DMSO is 10, and Dimethyl formamide is 5 mg/ml.
Dibutylone is still being researched and is considered a research compound. At this time it is only intended for scientific research and forensic settings and is NOT for human consumption.
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