Isoln from bark of Andira retusa Kunth. (Geoffroya retusa Lam.), Leguminosae: Hiller-Bombein, Arch. Pharm. 230, 513 (1892). Prepn of inactive compd: Kanevskaya, J. Prakt. Chem. 124, 48 (1929). Prepn of l-form: Kanao, J. Pharm. Soc. Jpn. 66, 4 (1946); Huguenin, Boissonnas, Helv. Chim. Acta 44, 213 (1961). Prepn of d-form: Izumiya, Nagamatsu, Bull. Chem. Soc. Jpn. 25, 265 (1952).