Found in oils of citronella, neroli, cyclamen, lemon grass, tuberose, rose, musk, balsam Peru, and tolu. Isoln: Elge, Chem. Ztg. 34, 857 (1910); 37, 1422 (1913); Kerschbaum, Ber. 46, 1732 (1913); Naves, Helv. Chim. Acta 32, 1798, 2181 (1949); LaFace, ibid. 33, 249 (1950). Synthesis: Ruzicka, ibid. 6, 492 (1923); Ruzicka, Firmenich, ibid. 22, 392 (1939); Nazarov et al., Zh. Obshch. Khim. 28, 1444 (1958); Shvarts, Petrov, ibid. 30, 3598 (1960); Popjak et al., J. Biol. Chem. 237, 56 (1962). Four possible stereoisomers. Stereochemistry: Bates et al., Chem. Ind. (London) 1961, 1907; J. Org. Chem. 28, 1086 (1963). trans-trans-Farnesol is the only stereoisomer present in many essential oils but occurs mixed with cis-trans-farnesol in petitgrain oil and several other oils: Naves, Compt. Rend. 251, 900 (1960). Stereospecific synthesis of trans-trans-farnesol: Corey et al., J. Am. Chem. Soc. 92, 6637 (1970).