Pharmacologically active constituent of the traditional medicinal plant, gastrodia, q.v. Prepn: B. Helferich et al., Ann. 508, 192 (1934); A. E. Pavlov et al., Russ. J. Gen. Chem. 71, 1811 (2001). Isoln from Gastrodia elata tuber: H. Taguchi et al., Chem. Pharm. Bull. 29, 55 (1981); H.-B. Li, F. Chen, J. Chromatogr. A 1052, 229 (2004). CE determn in medicinal formulations: Y. Zhao et al., ibid. 849, 277 (1999). Pharmacokinetics in rats: R. Wang et al., J. Liq. Chromatogr. Relat. Technol. 25, 857 (2002). Pharmacology in gerbils: S.-J. An et al., J. Neurosci. Res. 71, 534 (2003).