Parishin B is a phenolic glycoside that has been found in G. elata and has anti-asthmatic activity.1,2 It decreases specific airway resistance and leukocyte infiltration in bronchoalveolar lavage fluid (BALF) in a guinea pig model of allergen-induced asthma stimulated by ovalbumin inhalation when administered at a dose of 50 mg/kg.2
1.Yang, X.-D., Zhu, J., Yang, R., et al.Phenolic constituents from the rhizomes of Gastrodia elataNat. Prod. Res.21(2)180-186(2007) 2.Jang, Y.W., Lee, J.Y., and Kim, C.J.Anti-asthmatic activity of phenolic compounds from the roots of Gastrodia elata BlInt. Immunopharmacol.10(2)147-154(2010)