|Chemical and physical data|
|Molar mass||260.381 g·mol−1|
|3D model (JSmol)|
4-Hydroxy-N-propyl-N-isopropyltryptamine (4-HO-PiPT, Piprocin) is a substituted tryptamine derivative which is claimed to have psychedelic effects. It has been sold as a designer drug, first being identified in 2021 in British Columbia, Canada. 
4-Hydroxy-N,N-diisopropyltryptamine is a synthetic psychedelic drug. It is a higher homologue of psilocin, 4-HO-DET, and is a positional isomer of 4-HO-DPT and has a tryptamine molecular sub-structure.
Diisopropyltryptamine is a psychedelic hallucinogenic drug of the tryptamine family that has a unique effect. While the majority of hallucinogens affect the visual sense, DiPT is primarily aural.
4-HO-DET, also known as 4-hydroxy-diethyl-tryptamine, CZ-74, is a hallucinogenic drug and psychedelic compound of moderate duration. 4-HO-DET is a substituted tryptamine, structurally related to psilocin, ethocybin, and 4-HO-DIPT.
4-HO-MiPT is a synthetic substituted aromatic compound and a lesser-known psychedelic tryptamine. It is thought to be a serotonergic psychedelic, similar to magic mushrooms, LSD and mescaline. Its molecular structure and pharmacological effects somewhat resemble those of the tryptamine psilocin, which is the primary psychoactive chemical in magic mushrooms.
Methylenedioxybenzylamphetamine, abbreviated MDBZ, and systematically named 3,4-methylenedioxy-N-benzylamphetamine, is a psychedelic drug. It is the N-benzyl derivative of 3,4-methylenedioxyamphetamine (MDA). MDBZ was first synthesized by Alexander Shulgin. In his book PiHKAL , the minimum dosage is listed as 150 mg, and the duration unknown. Very few data exist about the pharmacological properties, metabolism, and toxicity of MDBZ.
4-HO-DPT is a substituted tryptamine with psychedelic effects. It is the 4-hydroxyl analog of dipropyltryptamine (DPT).
Propylisopropyltryptamine (PiPT) is a chemical in the tryptamine family, which reportedly produces psychedelic and hallucinogenic effects that resemble those of other related dialkyl tryptamine derivatives, although PiPT is reportedly relatively weak and short lasting. It has been sold as a designer drug, first being identified in 2021 in British Columbia, Canada.
Methoxetamine, abbreviated as MXE, is a dissociative hallucinogen that has been sold as a designer drug. It differs from many dissociatives such as ketamine and phencyclidine (PCP) that were developed as pharmaceutical drugs for use as general anesthetics in that it was designed specifically for recreational use. It is a rare example of a drug being so widely controlled without having an existing medical use.
4-HO-DsBT (4-hydroxy-N,N-di-sec-butyltryptamine) is a tryptamine derivative which acts as a serotonin receptor agonist. It was first made by Alexander Shulgin and is mentioned in his book TiHKAL, but was never tested by him. However it has subsequently been tested in vitro and unlike the n-butyl and isobutyl isomers which are much weaker, the s-butyl derivative retains reasonable potency, with a similar 5-HT2A receptor affinity to MiPT but better selectivity over the 5-HT1A and 5-HT2B subtypes.
5-HO-DiPT (5-hydroxy-N,N-di-iso-propyltryptamine) is a tryptamine derivative which acts as a serotonin receptor agonist. It is primarily known as a metabolite of the better known psychoactive drug 5-MeO-DiPT, but 5-HO-DiPT has also rarely been encountered as a designer drug in its own right. Tests in vitro show 5-HO-DiPT to have high 5-HT2A affinity and good selectivity over 5-HT1A, while being more lipophilic than the related drug bufotenine (5-HO-DMT), which produces mainly peripheral 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 44nM at 5-HT2A and 15nM 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.
5-MeO-MALT (5-methoxy-N-methyl-N-allyltryptamine) is a lesser-known psychedelic drug that is closely related to 5-MeO-DALT and has been sold online as a designer drug.
4-HO-EPT (4-hydroxy-N-ethyl-N-propyltryptamine) is a rarely encountered chemical compound of the tryptamine class, which is structurally related to psilocin (4-HO-DMT).
4-HO-McPT (4-hydroxy-N-methyl-N-cyclopropyltryptamine) is a psychedelic tryptamine derivative. It has serotonergic effects, and has reportedly been sold as a designer drug since around 2016, but was not definitively identified by forensic laboratories until 2018. It is illegal in Finland.
4-HO-McPeT (4-hydroxy-N-methyl-N-cyclopentyltryptamine) is a tryptamine derivative which has serotonergic effects.
Hydroxetamine is a recreational designer drug from the arylcyclohexylamine family, with dissociative effects. It is known as an active metabolite of the dissociative designer drug methoxetamine, but has also been sold in its own right since late 2019.
5-MeO-MET (5-Methoxy-N-methyl-N-ethyltryptamine) is a relatively rare designer drug from the substituted tryptamine family, related to compounds such as N-methyl-N-ethyltryptamine and 5-MeO-DMT. It was first synthesised in the 1960s and was studied to a limited extent, but was first identified on the illicit market in June 2012 in Sweden. It was made illegal in Norway in 2013, and is controlled under analogue provisions in numerous other jurisdictions.
5-Methoxy-N-propyl-N-isopropyltryptamine (5-MeO-PiPT) is a substituted tryptamine derivative which is claimed to have psychedelic effects. It has been sold as a designer drug, first being identified in 2021 in British Columbia, Canada.
4-HO-MALT (4-hydroxy-N-methyl-N-allyltryptamine) is a tryptamine derivative which has been sold as a designer drug, first being detected in Slovenia in 2021.