Valproic acid or 2-Propylpentanoic acid is CH3CH2CH2CH(CH2CH2CH3)COOH .

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... DIVALPROEX SODIUM (Depakote®, Depakote® ER) can help with seizure (convulsion) control in certain types of epilepsy. This drug is used for other conditions, such as the treatment of bipolar disorder, mania, the prevention of migraines, and control of behavioral problems associated with dementia. Generic divalproex delayed- or extended-release tablets or capsules are not yet available. ...
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Valproic acid Systematic (IUPAC) name 2-propylpentanoic acid Id ...
Wikipedia - [full article]

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