The amyrins are a pair of closely related natural chemical compounds of the triterpene class. They are designated α-amyrin and β-amyrin.

α-Amyrin is a precursor of Ursolic acid that is obtained by converting the CH₃ in 28 to COOH. β-Amyrin is a precursor of Boswellic acid that is obtained by converting the CH₃ in 24 to COOH. Ursolic acid has anti elastase activity, and like cholesterol, modulates the membrane fluidity. It prevents UV-B irradiation damages to the skin through prevention of lipid peroxidation and PGE2 release inhibition. Boswellic acid is a strong 5-lipoxigenase inhibitor and it has also anti elastase and anti GAGase properties. Alpha Amyrin has strong anti-inflammatory activity, is a pK_a inhibitor as well as a selective protease inhibitor: chymotrypsin is inhibited at an 18-micromolar level.

Amyrins are abundant naturally occurring two isomeric pentacyclic triterpenes. α-Amyrin has the 29-carbon at the 20 position. β-Amyrin has the 29-carbon shifted to the 19 position. Amyrins occur mostly as acetate in latex of rubber trees. They are considered they have broad-spectrum analgesic properties.

Taraxerol, a triterpenoid compound, has potent anti-inflammatory effects. Taraxerol is found in alcoholic beverages. Taraxerol is a constituent of Taraxacum officinale (dandelion). Taraxerol belongs to the family of Oleanane Triterpenes. These are triterpenes whose structure is based on the oleanane skeleton, an 4,4,6a,8a,11,11,14b-heptamethyl-hexadecahydropicene derivative.