The present invention is directed to novel fragrance compounds and their unexpected advantageous use in enhancing, improving or modifying a fragrance formulation through the addition of an olfactory acceptable amount of the compounds, wherein the compounds are represented by the following formula: wherein the dotted line represents a single or double bond; R is selected from the group consisting of propyl, butyl, and pentyl; and R1 and R2 together represent ═O or a ring structure represented by