Daphnetin 7-methyl ether has anti-inflammatory activity.

Imidazole is a planar 5-membered ring and a highly polar compound. It has been used extensively as a corrosion inhibitor. Imidazole is incorporated into many important biological molecules.

Enflurane, a volatile anaesthetic, is a potent inhibitor of high conductance Ca2+-activated K+ channels of Chara australis.