piperonal

noun Chemistry.

1. a white, crystalline, water-insoluble aldehyde, C8H6O3, which darkens on exposure to light: used chiefly in perfumery and organic synthesis.

noun

1. a white fragrant aldehyde used in flavourings, perfumery, and suntan lotions. Formula: C 8 H 6 O 3Also called: heliotropin