Found in essential oils from many flowers such as Melaleuca viridiflora Soland., Myrtaceae and Myroxylon pereirae (Royle) Klotzsch, Leguminosae: Naves, Compt. Rend. 251, 900 (1960). Isoln: Hellyer, McKern, J. Proc. R. Soc. N.S.W. 89, (Pt. 4), 188 (1955); Sutherland et al., Aust. J. Chem. 13, 357 (1960). Synthesis: Nazarov et al., Zh. Obshch. Khim. 28, 1444 (1958); Ofner et al., Helv. Chim. Acta 42, 2577 (1959); Shvarts, Petrov, Zh. Obshch. Khim. 30, 3598 (1960). Exists in two stereoisomeric forms: Bates et al., J. Org. Chem. 28, 1086 (1963).