Previously undescribed medium-chain acylcarnitines were identified in a urine sample from a patient with medium-chain acyl-CoA dehydrogenase deficiency. These are the 4-methylvaleryl, 4- and 5-methylhexanoyl, 6-methyl-heptanoyl-, 6-methyloctanoyl-, 4,5-dimethylhexanoyl- and 4,7-decadienoylcarnitines. Their chemical structures were obtained by gas chromatography-mass spectrometry analysis of their fatty acid moieties as picolinyl esters.
Libert, R., Van Hoof, F., Thillaye, M., Vincent, M.-F., Nassogne, M.-C., Stroobant, V., de Hoffmann, E., & Schanck, A. (1999). Identification of new medium-chain acylcarnitines present in urine of a patient with medium-chain acyl-CoA dehydrogenase deficiency. Journal of Inherited Metabolic Disease, 22(1), 9-18. https://doi.org/10.1023/A:1005482828392 (Original work published 1999)