Isolated from Sabadilla seed: Merck, Arch. Pharm. 229, 164 (1891); Hennig et al., J. Am. Pharm. Assoc. 40, 168 (1951). Structure: Auterhoff, Schwartz, Arch. Pharm. 288, 549 (1955); Mhrle, Auterhoff, ibid. 292, 337 (1959); Kupchan et al., J. Med. Pharm. Chem. 5, 690 (1962). NMR data: Ito et al., Tetrahedron 20, 913 (1964).
This monograph has been retired and is no longer subject to revision or update.