O-Acetylserine (OASS) is an acylated amino acid derivative. It is an intermediate in the biosynthesis of the common amino acid cysteine in bacteria and plants. Its presence in humans arises from either microbial metabolism in the gut or through consumption of foods containing OASS.

Lumefantrine (or benflumetol) is an antimalarial drug. It is only used incombination with artemether.

Nitrilotriacetic acid (Nitriloacetate) is a chelator that tracks and enriches His-tagged proteins in living cells by reacting with divalent metal ions-mediated 6His tagging.