I found a few references on (E)-4-hexen-1-ol - it is an aromatic compound found in various plants. These references may lead you to more information about the uses of this compound.
Vasil'ev, Andrei A.; Cherkaev, Georgii V.; Nikitina, Marina A. Substitution pattern at the double bond as a factor in the green odor of the C5-C10 alkenols. Mendeleev Communications (1995), (3), 115-8
Dulio, Andrea; Fuganti, Claudio; Zucchi, Gioia. Biogeneration of (E,E)-2,4-hexadienal and (E)-4-hexen-1-ol from sorbic acid by Colletotrichum gloeosporioides cultures. Flavour and Fragrance Journal (1999), 14(2), 79-81.
Umano, Katsumi; Nakahara, Kazuaki; Shoji, Akihiro; Shibamoto, Takayuki. Aroma Chemicals Isolated and Identified from Leaves of Aloe arborescens Mill. Var. natalensis Berger. Journal of Agricultural and Food Chemistry (1999), 47(9), 3702-3705.