Synonyms: Piperonal(8CI); 2H-Benzo[3,4-d]-1,3-dioxolan-5-ylformaldehyde;3,4-(Methylenedioxy)benzaldehyde; 3,4-Dihydroxybenzaldehyde methylene ketal;3,4-Dimethylenedioxybenzaldehyde; 5-Formyl-1,3-benzodioxolane;5-Formyl-1,3-benzodioxole; 5-Formylbenzodioxole;Benzo[1,3]dioxole-5-carbaldehyde; Benzo[d][1,3]dioxole-5-carboxaldehyde;Geliotropin; Heliotropin; Heliotropine; NSC 26826; Piperonaldehyde;Piperonylaldehyde; Protocatechuic aldehyde methylene ether