From bark of Geissospermum vellosii Allem., Apocynaceae: Hesse, Ann. 202, 141 (1880); Bertho, Moog, ibid. 509, 241 (1934). Identity with pereirine: Bertho, Koll, Naturwissenschaften 48, 49 (1961). Structure: Janot et al., Compt. Rend. 250, 4383 (1960); Bertho, Koll Ber. 94, 2737 (1961). Synthesis: Hymon, Schmid, Helv. Chim. Acta 49, 2067 (1966); of dl-form: Dadson, Harley-Mason, Chem. Commun. 1969, 665; Harley-Mason, Taylor, ibid. 1970, 812.