Synthetics
Lilac acetaldehyde has a bitter almond aroma and taste.
Mosciano, Gerard P&F 15, No. 1, 19, (1990): Sweet, green, fruity, with nutty, phenolic and fruity nuances
Luebke, William tgsc, (1994): Fresh sweet green cortex lilac narcissus nutty phenolic fruity cherry
Givaudan: Strong, floral, green, sweet
Syringa aldehyde is a floral-green impact chemical, used as a top note in lilac, hyacinth and rose bases. it is less pungent than phenyl acetaldehyde.