Abstract: Compounds of formula (I) wherein R is hydrogen and the bond between C-2 and C-3 together with the dotted line represents a double bond, or R is —CH2— and together with C-2 and C-3 represents a cyclopropane ring and the bond between C-2 and C-3 together with the dotted line represents a single bond, having floral rosy odor notes, their use as fragrance and perfumed products comprising them.

Abstract: Compounds of formula (I) wherein R is hydrogen and the bond between C-2 and C-3 together with the dotted line represents a double bond, or R is —CH2— and together with C-2 and C-3 represents a cyclopropane ring and the bond between C-2 and C-3 together with the dotted line represents a single bond, having floral rosy odor notes, their use as fragrance and perfumed products comprising them.

Abstract: A perfume composition including the compound 4-[(1,5-dimethylhexyl)oxy]butanal in both its racemic and enantiomeric forms.

Abstract: A perfume composition including at least one compound having the formula: wherein p, q and r are independently selected from 0 and 1, p+q+r being from 0-3 and X1 is saturated or unsaturated, such that: (a) when p+q+r=0, R1, R2 and R12 are Me; R3-5 and R9-11 are H; (b) when p+q+r=1, R1 and R12 are independently selected from H, Me and Et; R2 is selected from H and C1-C4 alkyl; R3-5 and R9 are independently selected from H and methyl; and R8 and R10 are H; (c) when p+q+r=2, R1 and R2 are selected from H and C1-C4 alkyl, R3 and R9-12 are independently selected from H and methyl: R4-5 are H, or R4 and R5 together form a methylene group; and R6-7 are H; (d) when p+q+r=3, R1, R2 and R12 are Me; and R3-11 are H.