Aminoisobutyric acid is a nonprotein amino acid (is an end product of pyrimidine metabolism) excreted in the urine of about 5% of healthy individuals and high excretion is an autosomal recessive phenotype.

Guaiacol is a precursor to various flavorants, such as eugenol and vanillin. Its derivatives are used medicinally as an expectorant, antiseptic, and local anesthetic.

Neoarctin B is a natural product of Arctium, Asteraceae. Neoarctin B can be used as a reference standard.