N-Acetyl-L-histidine monohydrate (NAH) also exhibits a strong phylogenetic component in that it is a major osmolyte in the brain and eye of teleost (bony) fish, amphibians and reptiles, but is present in much lower amounts in brain and other tissues of homeothermic (endothermic) vertebrates.

2-Hydroxycinnamic acid is a natural product isolated from Angraecum fragrans has photooxidant activity.

Diisopropyl xanthogen disulfide can be used to synthesize a proligand for metal complexes related to the molybdenum cofactor.