The present invention relates to novel compounds and their use in fragrance compositions. Novel hexahydro ethanochromene and related hexahydro ethanochromane compounds of the present invention are represented by formula:wherein R1 is hydrogen or methyl R2 and R2′ are identical and are hydrogen or methyl R3 and R3′ are identical and are hydrogen or methyl R4 and R5 are independently hydrogen or methyl R6 is methyl, ethyl, or isopropyl, with the proviso that when R1 is H, R2 and R3′ form an alkylene bridge containing 1 or 2 carbon atoms, and wherein the broken line represents a single or double bond.
