From bark of Lunasia costulata Miq., and L. quercifolia K. Schum. et Lauterb., Rutaceae. Isoln: Boorsma, Bull. Inst. Bot. Buitenzorg 6, 14 (1900). Structure: Price, Aust. J. Chem. 12, 458 (1959). Stereochemistry: Bowman et al., J. Chem. Soc. Perkin Trans. 1 1973, 1051.