Patent ID: 7550417

Claim:
A fragrance composition comprising a compound of formula (I) wherein R 1 is hydrogen or C 1 -C 3 alkyl; Y is a monovalent residue selected from the group consisting of —CR 2 O and —CHR 2 OR 3 , wherein R 2 is hydrogen or C 1 -C 3 alkyl; and R 3 is hydrogen or C 1 -C 3 alkyl; or Y is a divalent residue of the formula —CHR 2 OCHR 2 — forming together with the carbon atoms C-2, C-5′ and C-4′ a six-membered ring system, wherein R 2 is hydrogen or methyl; and the bonds between C-5′ and C-6′, C-4′ and C-5′, and C-2 and C-5′ are single bonds; or one of the bonds between C-5′ and C-6′, C-4′ and C-5′, and C-2 and C-5′ together with the dotted line represents a double bond; with the proviso that the total number of carbon atoms of the compound of formula (I) is 20 or less.