2,5-Dimethoxy-4-ethylamphetamine is a psychedelic drug of the phenethylamine and amphetamine chemical classes. It was first synthesized by Alexander Shulgin, and was described in his book PiHKAL.
4-Bromo-2,5-dimethoxy-1-benzylpiperazine (2C-B-BZP) is a psychoactive drug and research chemical of the piperazine chemical class which has been sold as a "designer drug". It produces stimulant effects similar to those of benzylpiperazine (BZP).
2C-YN is an analog of phenethylamine that can be synthesized from 2C-I. Very little data exists about the pharmacological properties, metabolism, and toxicity of 2C-YN, although Daniel Trachsel lists it as having a dosage of around 50mg and a duration of around 2 hours, with relatively mild psychedelic effects.
4-Substituted-2,5-dimethoxyamphetamines (DOx) is a chemical class of substituted amphetamine derivatives featuring methoxy groups at the 2- and 5- positions of the phenyl ring, and a substituent such as alkyl or halogen at the 4- position of the phenyl ring. Most compounds of this class are potent and long-lasting psychedelic drugs, and act as highly selective 5-HT2A, 5-HT2B, and 5-HT2C receptor partial agonists. A few bulkier derivatives such as DOAM have similarly high binding affinity for 5-HT2 receptors but instead act as antagonists, and so do not produce psychedelic effects though they retain amphetamine-like stimulant effects.
2C-T-16 is a lesser-known psychedelic drug. It was originally named by Alexander Shulgin as described in his book PiHKAL, however while Shulgin began synthesis of this compound he only got as far as the nitrostyrene intermediate, and did not complete the final synthetic step. Synthesis of 2C-T-16 was finally achieved by Daniel Trachsel some years later, and it was subsequently reported as showing similar psychedelic activity to related compounds, with a dose range of 10–25 mg and a duration of 4–6 hours, making it around the same potency as the better-known saturated analogue 2C-T-7, but with a significantly shorter duration of action. Binding studies in vitro showed 2C-T-16 to have a binding affinity of 44 nM at 5-HT2A and 15 nM at 5-HT2C. 2C-T-16 and related derivatives are potent partial agonists of the 5-HT1A, 5-HT2A, 5-HT2B and 5-HT2C receptors and induce a head-twitch response in mice.
2-Bromomescaline (2-Br-M) is a derivative of the phenethylamine hallucinogen mescaline which has an unusual 2-bromo substitution. It is an agonist for serotonin receptors, with a binding affinity of 215 nM at 5-HT1A, 513 nM at 5-HT2A and 379 nM at 5-HT2C, so while it is around ten times more tightly binding than mescaline at 5-HT1A and 5-HT2A receptors, it is over twenty times more potent at 5-HT2C. It has been reported as a designer drug, first identified in Austria in January 2023.
Trifluoromescaline (TF-M) is a derivative of the phenethylamine hallucinogen mescaline, which has a trifluoromethoxy group replacing the central methoxy group of mescaline. Synthesis of this compound was first reported by Daniel Trachsel in 2011, alongside many other related compounds. Trifluoromescaline was found to be one of the most potent compounds in the series, with a reported dosage of 15–40 mg, and a slow onset of action and long duration of effects, lasting 14–24 hours or more.
2C-Se is a lesser-known psychedelic drug. It was originally named by Alexander Shulgin as described in his book PiHKAL. Shulgin considered 2C-Se to be around three times the potency of mescaline, but was too concerned about toxicity to test it extensively, though he considered it noteworthy as the only psychedelic drug to contain a selenium atom.
2,5-dimethoxy-4-bromophenylpiperazine (2C-B-PP) is a drug of the phenylpiperazine class. It acts as an agonist at serotonin receptors, and in studies on rats substituted for the psychedelic amphetamine derivative DOM with around 1/10 the potency but similar rates of stimulus-appropriate responding at the highest dose.
2C-EF is a lesser-known psychedelic drug. It was originally named by Alexander Shulgin as described in his book PiHKAL, but he never synthesised it himself, though it has been synthesised and its activity tested in subsequent years.
2C-TFE is a lesser-known psychedelic drug related to compounds such as 2C-E and 2C-TFM. It was first synthesised by Daniel Trachsel, and is reportedly a potent psychedelic with an active dose in the 5–15 mg range, and a long duration of action of 12–24 hours.
4C-B is a lesser-known psychedelic drug which is related to 2C-B and DOB. It is a reasonably potent 5-HT2A receptor partial agonist with a Ki of 7.6nM, but has relatively low efficacy. It is briefly mentioned in Alexander Shulgin's book PiHKAL but was never tested by him, however it has subsequently been tested by other researchers and was found to be active in a dose range of 50-80mg with a duration of around 8 hours, though with generally milder effects than 2C-B or DOB.
2C-T-3 is a lesser-known psychedelic drug related to compounds such as 2C-T-7 and 2C-T-16. It was named by Alexander Shulgin but was never made or tested by him, and was instead first synthesised by Daniel Trachsel some years later. It has a binding affinity of 11nM at 5-HT2A and 40nM at 5-HT2C. It is reportedly a potent psychedelic drug with an active dose in the 15–40 mg range, and a duration of action of 8–14 hours, with visual effects comparable to related drugs such as methallylescaline.
2C-T-28 is a lesser-known psychedelic drug related to compounds such as 2C-T-7 and 2C-T-21. It was named by Alexander Shulgin but was never made or tested by him, and was instead first synthesised by Daniel Trachsel some years later. It has a binding affinity of 75 nM at 5-HT2A and 28 nM at 5-HT2C. It is reportedly a potent psychedelic drug with an active dose in the 8–20 mg range, and a duration of action of 8–10 hours, with prominent visual effects. 2C-T-28 is the 3-fluoropropyl instead of 2-fluoroethyl chain-lengthened homologue of 2C-T-21 and has very similar properties, although unlike 2C-T-21 it will not form toxic fluoroacetate as a metabolite.
2C-CP (2C-cP) is a recreational designer drug from the substituted phenethylamine family, with psychedelic effects. It was first synthesised by Daniel Trachsel and colleagues in 2006. It has a binding affinity (Ki) of 95 nM at the serotonin receptor 5-HT2A and 41 nM at 5-HT2C and is active at a dosage of between 15 and 35 mg with a duration of 3 to 6 hours.
2C-V is a recreational designer drug from the substituted phenethylamine family, with psychedelic effects. It was first synthesised by Daniel Trachsel and colleagues in 2006. It is active at a dosage of 25 mg with a duration of around 5 hours.
DOPF is a designer drug from the substituted amphetamine family. It was first synthesised by Alexander Shulgin and David Nichols in 1989 but was never published at the time, and was finally disclosed in Daniel Trachsel's review of the field in 2013. It has a binding affinity (Ki) of 9 nM at the serotonin receptor 5-HT2A but is not known to have been tested in humans.
2C-AL is a drug from the substituted phenethylamine family which acts as an agonist of the 5-HT2A receptor, with an EC50 of 2.15nM at 5-HT2A vs 77.71nM at 5-HT2B, and produces a head-twitch response in animal studies. It was first discussed as a hypothetical compound in Daniel Trachsel's 2013 review of the field after his successful synthesis of the related compounds 2C-V and 2C-YN, and finally synthesised by a team at Gilgamesh Pharmaceuticals in 2020 using a different synthetic route from that employed by Trachsel.
DOB-2-DRAGONFLY-5-BUTTERFLY is a drug with an unusual furo[2,3-g]chromene core structure which acts as a 5-HT2A receptor agonist. It was first synthesised by David E. Nichols and colleagues in 2008, and while it is weaker than similar compounds such as Bromo-DragonFLY it is still the most potent among a number of related derivatives.
2C-T-21.5 is a lesser-known psychedelic drug related to compounds such as 2C-T-21 and 2C-T-28. It was originally named by Alexander Shulgin and discussed in his book PiHKAL, but was not synthesised at that time. 2C-T-21.5 was ultimately synthesised and tested by Daniel Trachsel some years later. It has a binding affinity of 146 nM at 5-HT2A and 55 nM at 5-HT2C. It produces typical psychedelic effects, being slightly less potent but somewhat longer acting than 2C-T-2 or 2C-T-21, with an active dose of 12–30 mg, and a duration of action of 8–14 hours. Unlike 2C-T-21 it will not form the highly toxic fluoroacetate as a metabolite, instead producing the less toxic difluoroacetic acid.
