l leucine carnitine L-Leucine, 120 Capsules (500 mg per Capsule) l-leucine l-carnitine and creatine Amazon.com:

These are usually bound to proteins with characteristic acyl-CoA binding domains and depending upon on the energy status of the cell, they are directed to particular metabolic pathways such as storage or energy production by many different proteins including fatty acid binding proteins and sterol carrier protein 2

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This could be explained by the fact that the chemical ionization technique falls within the soft ionization approach, which produces pieces that are not very sensitive and are therefore unusable for identification

Hrvatsko Drutvo za Nefrologiju, Dijializu i Transplantaciju Hrvatskog Lijenikog Zbora