Isoproscaline

Isoproscaline
Clinical data
Other names	4-Isopropoxy-3,5-dimethoxyphenethylamine
Routes of; administration	Oral
Drug class	Serotonergic psychedelic; Hallucinogen
ATC code	None;
Pharmacokinetic data
Duration of action	10–16 hours
Identifiers
	IUPAC name 2-{{#parsoidfragment:1}}{3,5-dimethoxy-4-[(propan-2-yl)oxy]phenyl}ethan-1-amine;
CAS Number	64778-72-9 ;
PubChem CID	15102787 ;
ChemSpider	10439597 ;
UNII	7W67II88GC ;
ChEMBL	ChEMBL126203 ;
CompTox Dashboard (EPA)	DTXSID70215088 ;
Chemical and physical data
Formula	C13H21NO3
Molar mass	239.315 g·mol−1
3D model (JSmol)	Interactive image ;
Melting point	163 to 164 °C (325 to 327 °F) (hydrochloride)
	SMILES CC(C)Oc1c(cc(cc1OC)CCN)OC;
	InChI InChI=1S/C13H21NO3/c1-9(2)17-13-11(15-3)7-10(5-6-14)8-12(13)16-4/h7-9H,5-6,14H2,1-4H3 ; Key:UBNHYNYMUORHAM-UHFFFAOYSA-N ;
	(verify)

Last updated November 18, 2025

Isoproscaline or 4-isopropoxy-3,5-dimethoxyphenethylamine is an analogue of mescaline.^[1] It is closely related to proscaline and was first synthesized by David E. Nichols and colleagues.^[2] It produces hallucinogenic, psychedelic, and entheogenic effects.

Use and effects

Little is known about the psychopharmacological effects of isoproscaline. In his book PiHKAL , Alexander Shulgin lists a psychedelic dose as being 40–80 mg, with effects lasting 10–16 hours.^[1]

Interactions

Pharmacology

Pharmacodynamics

The mechanism that produces the hallucinogenic and entheogenic effects of isoproscaline is most likely to result from action as a 5-HT_2A serotonin receptor agonist in the brain, a mechanism of action shared by all of the hallucinogenic tryptamines and phenethylamines.

Chemistry

Isoproscaline is in a class of compounds commonly known as phenethylamines, and the full chemical name is 2-(4-isopropoxy-3,5-dimethoxyphenyl)ethanamine.

Society and culture

Legal status

Isoproscaline is unscheduled in the United States; however, because of its close similarity in structure and effects to mescaline, possession and sale of isoproscaline may be subject to prosecution under the Federal Analog Act.

In the UK, its highly likely that this compound would be covered by the "phenylethylamine amendment" to the misuse of drugs act likely rendering it a Class A controlled drug.

References

1 2 3 4 Shulgin, Alexander; Shulgin, Ann (September 1991). PiHKAL: A Chemical Love Story. Berkeley, California: Transform Press. ISBN 0-9630096-0-5. OCLC 25627628. Isoproscaline entry
↑ Nichols DE, Dyer DC (February 1977). "Lipophilicity and serotonin agonist activity in a series of 4-substituted mescaline analogues". J Med Chem. 20 (2): 299–301. doi:10.1021/jm00212a022. PMID 836502.

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[PiHKAL-1] 1 2 3 4 Shulgin, Alexander; Shulgin, Ann (September 1991). PiHKAL: A Chemical Love Story. Berkeley, California: Transform Press. ISBN 0-9630096-0-5. OCLC 25627628. Isoproscaline entry

[NicholsDyer1977-2] Nichols DE, Dyer DC (February 1977). "Lipophilicity and serotonin agonist activity in a series of 4-substituted mescaline analogues". J Med Chem. 20 (2): 299–301. doi:10.1021/jm00212a022. PMID 836502.

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