Methylpentynol

Methylpentynol
Clinical data
Trade names	Oblivon
Other names	Methylparafynol
Routes of; administration	By mouth
ATC code	N05CM15 (WHO) ;
Legal status
Legal status	BR: Class C1 (Other controlled substances); Withdrawn;
Identifiers
	IUPAC name 3-methylpent-1-yn-3-ol;
CAS Number	77-75-8 ;
PubChem CID	6494;
ChemSpider	21106516 ;
UNII	B017BC5B1N;
CompTox Dashboard (EPA)	DTXSID5021756 ;
ECHA InfoCard	100.000.960
Chemical and physical data
Formula	C6H10O
Molar mass	98.145 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CCC(C)(C#C)O;
	InChI InChI=1S/C6H10O/c1-4-6(3,7)5-2/h1,7H,5H2,2-3H3 ; Key:QXLPXWSKPNOQLE-UHFFFAOYSA-N ;
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Methylpentynol (also known as methylparafynol, trade names Dormison, Atemorin, Oblivon) is a tertiary pentynol with hypnotic/sedative and anticonvulsant effects and an exceptionally low therapeutic index. It was discovered by Bayer in 1913 and was used shortly thereafter for the treatment of insomnia, but its use was quickly phased out in response to newer drugs with far more favorable safety profiles.

The drug was marketed again in the United States, Europe and elsewhere from 1956 well into the 1960s as a rapid-acting sedative. The drug was quickly overshadowed at that point by benzodiazepines and is no longer sold anywhere.