Title: Brallobarbital
CAS Registry Number: 561-86-4
CAS Name: 5-(2-Bromo-2-propenyl)-5-(2-propenyl)-2,4,6(1H,3H,5H)-pyrimidinetrione
Additional Names: 5-allyl-5-(2-bromoallyl)barbituric acid
Trademarks: Vesperone (UCB)
Molecular Formula: C10H11BrN2O3
Molecular Weight: 287.11
Percent Composition: C 41.83%, H 3.86%, Br 27.83%, N 9.76%, O 16.72%
Literature References: Prepn: Morren, BE 497501 (1950), C.A. 49, 1100e (1955). Metabolism: Keding, Schmidt, Arzneim.-Forsch. 19, 342 (1969).
Properties: Solid, mp 168-169°.
Melting point: mp 168-169°
NOTE: This is a controlled substance (depressant): 21 CFR, 1308.13.
Therap-Cat: Sedative, hypnotic.
Keywords: Sedative/Hypnotic; Barbituric Acid Derivatives.
Brandy Brassidic Acid Brassinolide Brayera Brazilin

Brallobarbital ball-and-stick animation.gif
Systematic (IUPAC) name
Clinical data
Legal status  ?
CAS number 561-86-4 YesY
ATC code None
PubChem CID 68416
ChemSpider 61699 YesY
Synonyms Brallobarbital
Chemical data
Formula C10H11BrN2O3 
Mol. mass 287.110 g/mol
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Brallobarbital is a barbiturate developed in the 1920s.[1] It has sedative and hypnotic properties, and was used for the treatment of insomnia. Brallobarbital was primarily sold as part of a combination product called Vesparax, composed of 150 mg secobarbital, 50 mg brallobarbital and 50 mg hydroxyzine.[2] The long half-life of this combination of drugs tended to cause a hangover effect the next day,[3] and Vesparax fell into disuse once newer drugs with lesser side effects had been developed.[4]