trans-2-Hexenal is an unsaturated aldehyde that has an apple odour. trans-2-Hexenal is produced by soybean plants, and is also a sex pheromone produced by the female polyphemus moth.
參考文獻
Corbo, M., et al.: J. Agr. Food Chem., 48, 2401 (2000); De Lucca, A., et al.: J. Food Sci., 76, M381 (2011); Riddiford, L.: Science, 158, 139 (1967)