Cyclosporin A-d4 is a deuterated derivative of cyclosporin A. Cyclosporin A is a nonpolar cyclic oligopeptide and an immunosuppressant.

Estrone-D4 is the deuterated form of Estrone. Estrone is an estrogen.

Paracetamol-C2H3 is a deuterated form of 4-acetaminophenol.

Valproic Acid-d6 is the deuterated form of valproic acid. Valproic acid is a fatty acid with anticonvulsant properties.

Calcifediol-d3 is the deuterated form of calcidiol.Calcidiol is the major circulating metabolite of vitamin D3 and is a competitive inhibitor.

[(2)H10]phenytoin is a deuterated form of phenythoin. Phenytoin is an anticonvulsant drug.

Calcifediol-D6 is a deuterated form of calcidiol.Calcidiol is the major circulating metabolite of vitamin D3 and is a competitive inhibitor.

17α-Hydroxy Progesterone-d8 is the deuterated form of 17-hydroxyprogesterone. 17-Hydroxyprogesterone is an endogenous progestin and a chemical intermediate in the biosynthesis of other steroid hormones.

25-Hydroxy vitamin D2-d3 is the deuterated form of (22Z)-25-OH-D2. (22Z)-25-OH-D2 is a metabolic intermediate of vitamin D₂ and is produced by hydroxylation in the liver.

Testosterone-D5 is a deuterated form of testosterone. Testosterone is the major endogenous androgen.