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.

Antiviral agent 17 (Compound 4) is an anti-infection compound with strong antiviral effects, demonstrated by an EC50 of 0.015 μM in a human replicon assay, and effective against murine norovirus.

Allisartan Isoproxil, an angiotensin II receptor antagonist, is used to treat mild to moderate essential hypertension.