Ursodeoxycholic Acid-d4 (Ursodeoxycholic acid-2,2,4,4-d4) is the deuterium substitute of Ursodeoxycholic acid, and is an internal standard for the quantitative determination of Ursodeoxycholic Acid (UDCA) levels by LC/MS or GC/MS.

2-Methylanisole is a monomethoxybenzene, a food additive used as an intermediate in the synthesis of compounds with a methylhydroquinone core .

Dimethocaine is a local anesthetic with reported stimulant properties most similar to cocaine.