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- W630975830 abstract "It is well known that 3-methylbutyrylurea is one of the metabolites of α-bromoisovalerylurea (bromvalerylurea), and the present experiment was carried out in order to find other metabolites of this hypnotic. After the administration of bromovalelrylurea to a rabbit, the urine was collected daily and passed through an anion-exchange resin column. As a result of thin-layer chromatography of the fractions eluted with dil acetic acid, a new Ninhydrin-positive spot was detected much more clearly in the first 24-hr urine than in any other cxcreted urine. From the first 24-hr urine, this substance was obtained as a pure crystalline compound. Mass spectra, infrared spectra, and other chemical analyses suggested that this Ninhydrin-positive spot is a cysteine derivative of bromvalerylurea. Finally, this compound was determined as 2-(2-amino-2-carboxyetylthio)-3-methylbutyrylurea by comparison with a synthetic compound." @default.
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- W630975830 date "1975-01-01" @default.
- W630975830 modified "2023-10-18" @default.
- W630975830 title "On Metabolism of Bromvalerylurea. I. Detection of 2-(2-Amino-2-carboxy-ethylthio)-3-methyl-butyrylurea from Rabbit Urine" @default.
- W630975830 doi "https://doi.org/10.1248/jhs1956.21.188" @default.
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