Gastrodin, a phenolic glucoside, is the main active ingredient of the traditional Chinese medicinal compound Tianma. Gastrodin is an active component of Gastrodia elata Blume, a herb belonging to the Orchidaceae family.Gastrodin has been used as a control to estimate the gastrodin content in the leaves, roots and stems of Anoectochilus formosanus Hayata. Gastrodin, a phenolic glucoside, is the main active ingredient of the traditional Chinese medicinal compound Tianma. Gastrodin is an active component of Gastrodia elata Blume, a herb belonging to the Orchidaceae family.