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Clinica chimica acta; international journal of clinical chemistry

New metabolites in isovaleric acidemia.


PMID 6452974

Abstract

Two metabolites, 4-hydroxyisovaleric acid and mesaconic acid, have been identified and quantified in the urine of a patient with isovaleric acidemia. These compounds do not appear to have been reported previously as being components of human metabolism. In addition, large quantities of 3-methylbutyrolactone, the lactone of 4-hydroxyisovaleric acid, were observed in the volatile profile obtained by headspace chromatography. The demonstration of 4-hydroxyisovaleric acid supports the contention that urinary methylsuccinic acid seen in patients with isovaleric acidemia has arisen by omega-oxidation of isovaleric acid. The identification of mesaconic acid may indicate that the methylsuccinic acid formed in these patients is subject to further metabolism.

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131040
Mesaconic acid, 99%
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