Synthetics
Lemon hexadiene has no known smell.
Luebke, William tgsc, (1989): Powerful lemon lime truffle
Bedoukian Research: A powerful lemon-lime topnote, drying down to an exquisite black perigord truffle
A unique combination of lemon-lime, tropical, marine, and watery notes. excellent topnote in imparting freshness. great in cool water types.