C6-Carnitine-d3 is one of the derivatives of the L-isomer of hexanoylcarnitine, labeled with stable isotopes.

Cortisone-d8 is a deuterated form of the cortisone and is intended for use as an internal standard for the quantification of cortisone by GC- or LC-MS.

Lysopc(26:0), also known as LysoPC a C26:0, is used as internal standard LC-MS studies.

(C26) Carnitine-d3 is a deuterium labeled (C26) Carnitine and intended for use as an internal standard in GC- or LC-MS.

(C26) D,L-Carnitine is a very long chain fatty-acylcarnitine also known as o-hexacosanoylcarnitine and intended for use as an internal standard in GC- or LC-MS.

C26:0-lysophosphatidylcholine-d4 is deuterated C26:0-lysophosphatidylcholine (Lysopc(26:0)) and intended for use as an internal standard for the quantification of C26:0-lysophosphatidylcholine by GC- or LC-MS.

Acetyl-L-carnitine is a short-chain acylcarnitine that is used as a control for MS/MS.

Isotopically labeled acetylated d3-carnitine, C2 Carnitine-d3, is used for MS imaging and quantitative measurements.

The acylcarnitine C3 (propionylcarnitine) level along with C3/C2 ratio is used as a diagnostic marker to evaluate metabolism disorders.

C3 Carnitine-d3 is a labeled with stable isotop of carnitine derivative is used for tracking of carnitine and metabolic studies by mass spectrometry (MS).