Fresh Marine Notes

1-Methyl-4-(4-methyl-3-pentenyl) cyclohex-3-ene-1-carbaldehyde and 1-methyl-4-(4-methylpentyl)cyclohex- 3-ene-1-carbaldehyde are two chemically and olfactively related cyclic aldehydes. 1-Methyl- 4-(4-methyl-3-pentenyl)cyclohex-3-ene-1- carbaldehyde (Precyclemone B)a is a colorless to pale yellow liquid with an aldehydic, fresh, powerful marine, floral odor (see F-1). Reminiscent of lily of the valley leaves, it is a very intensive and substantive material, with incense and sea breeze nuances.*