From seed of Ormosia dasycarpa Jacks., Leguminosae: Hess, Merck, Ber. 52, 1976 (1919); from O. panamensis Benth., Leguminosae: Lloyd, Horning, J. Am. Chem. Soc. 80, 1506 (1958). Structural studies: Wilson, Chem. Ind. (London) 1965, 472; Tetrahedron 21, 2561 (1965). Composed of one molecule of panamine and one molecule of ormosanine; NMR elucidation of structure: N. S. Bhacca et al., J. Am. Chem. Soc. 105, 2538 (1983).