1. FormAldehyde, ‎AcetAldehyde, ‎BenzAldehyde, Citral

2. Pure lanthanum oxide, obtained by calcining oxygen-containing lanthanum salts at temperatures of at least 700°C, is used as a heterogeneous catalyst in the aldol condensation of citral and acetone to pseudoionone; pseudoionone is prepared by a process of aldol condensation of citral and acetone in liquid phase, using pure lanthanum oxide.

3. Citral, or 3,7-dimethyl-2,6-octadienal or lemonal, is either a pair, or a mixture of terpenoids with the molecular formula C10H16O.

4. CinammAldehyde: naturally occurring in, and smelling of, cinnamon bark (makes up to 75% of the essential oil) Citral– a more complex decanal (10Carbs), smelling of lemons

5. However, Aldehyde abundance in the environment does not always spell doom because many familiar foods contain a variety of non-toxic Aldehydes that in addition to providing flavor to foods (e.g., aniseAldehyde, benzAldehyde, cinnamAldehyde, citral Aldehyde) and beverages (e.g., aniseAldehyde) are almost certain to stimulate beneficial actions