Carasiphenol C is a natural product from Carex humilis Leyss.

Isoquinoline is an analog of pyridine. Isoquinoline-based alkaloids, such as p-tolyl bisisoquinoline, phthaloyl isoquinoline, and naphthyl isoquinoline, exhibit anticancer activity.Berberine, an isoquinoline alkaloid, exerts anti-inflammatory effects in diabetic mice by downregulating the gene expression ratios of pro-/anti-inflammatory and Th1/Th2 cytokines.Additionally, some isoquinoline-based compounds also possess antidepressant, antibacterial, antimalarial, and anti-HIV activities.

(S)-Ebalzotan is the S configuration of Ebalzotan.Ebalzotan is a 5-HT1A receptor agonist that is used in the study of depression.