A compound of Formula wherein R 1 is derived from an alcohol of formula R 1 OH selected from the group consisting of anisic alcohol, fenchylic alcohol, 9-decen-1-ol, citronellol, 3-methyl-5-phenyl-1-pentanol, (4-isopropylcyclohexyl)methanol, 4-phenylbutan-2-ol, 2,6-dimethyl-7-octen-2-ol, 3,7-dimethyl-2,6-octadien-1-ol, -3-hexen-1-ol, 2-hexanol, 5-ethyl-2-nonanol, 2,6-nonadien-1-ol, borneol, 1-octen-3-o1, 4-cyclohexyl-2-methyl-2-butanol, 2-methyl-4-phenyl-2-butanol, 2-methyl-1-phenyl-2-propanol, dihydroeugenol, 8-p-menthanol, 3,7-dimethyl-1-octanol, 2,6-dimethyl-2-heptanol, dodecanol, eugenol, tetrahydro-2-isobutyl-4-methyl-4 -pyranol, isoeugenol, linalool, 2-methoxy-4-propyl-1-cylohexanol, α-terpineol, tetrahydromuguol, 3,7-dimethyl-3-octanol, 4-(4-hydroxy-4-methylpentyl)-cyclohex-3-ene-1-carbaldehyde, 5,6-dimethyl-1-methylethenylbicyclo[2.2.1]hept-5-ene-2-methanol, 2-phenylethanol, 1-phenylpropanol, 2-phenylpropanol, (2,5-dimethyl-2,3-dihydro-1H-inden-2-yl)methanol, 2,2-dimethyl-3-(3-methylphenyl)-propan-1-ol, 2-pentylcyclopentanol, 7-hydroxy-3,7-dimethyloctanal, menthol, 2,6-dimethylheptan-2-ol, 2-tert-butylcyclohexanol, 4-tert-butylcyclohexanol, 2,6-dimethyl-3,5-octadien-2-ol, 2-methyl-6-methylene-7-octen-2-ol, 3,7,9-trimethyl-1,6-decadien-3-ol, methyl salicylate, cis-3-hexenyl salicylate, 3,6-dimethyloctan-3-ol, 1,2-dimethyl-3-prop-1-en-2-ylcyclopentan-1-ol, 2-methyl-4-phenylpentanol, 3-methyl-5-(2,2,3-trimethyl-1-cyclopent-3-enyl)pentan-2-ol, -3,3-dimethyl-5-(2,2,3-trimethyl-3-cyclopenten-1-yl)-4-penten-2-ol, 1-(2,2,6-trimethylcyclohexyl)hexan-3-ol and -4-methyldec-3-en-5-ol, and 4-(4-hydroxyphenyl)butan-2-one; and R 2 is, independently, hydroxyl group, optionally substituted C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, or -O(C=O)CH 2 wherein any two of R 2 may form an optionally substituted 5 or 6 membered ring; wherein a compound of Formula I is capable of releasing a compound, when oxidized, selected from the group consisting of a fragrant alcohol of formula R 1 OH as defined above, and a fragrant aryl aldehyde selected from the group consisting of anisaldehyde, 4-methylbenzaldehyde, 4-ethylbenzaldehyde, 4-isopropylbenzaldehyde, 4-(tert-butyl) benzaldehyde, 2-methoxybenzaldehyde, 3,4-dimethoxybenzaldehyde, heliotropin, 4-hydroxybenzaldehyde, vanillin, 3-ethoxy-4-hydroxybenzaldehyde, 4-formyl-2-methylphenyl acetate, 4-formyl-2-methoxyphenyl isobutyrate and 3,5,5,6,7,8,8-heptamethyl-5,6,7,8-tetrahydronaphthalene-2-carbaldehyde; and provided that compound of formula is not 1,1'-(oxydi-1- -propene-3,1-diyl)bis[4-methoxybenzene], 4-(3-((3,7-dimethyl- -oct-6-en-1-yl)oxy)- -prop-1-en-1-yl)-1,2-dimethoxybenzene, 1-(3-((3,7-dimethyl- -oct-6-en-1-yl)oxy)- -prop-1-en-1-yl)-4-methoxybenzene, -2,4-dimethoxy-1-(3-((4-methoxybenzyl)oxy)prop-1-en-1-yl)benzene, p-Methylcinnamyl hydrocinnamyl ether and -1-methoxy-4-(3-((4-methoxyphenyl)methanyloxy)prop-1-enyl)benzene; or wherein the compound of Formula is -(3-(2,6-dimethyloct-7-en-2-yloxy)prop-1-enyl)benzene, -(3-(2,6-dimethyloct-7-en-2-yloxy)prop-1-enyl)benzene, -(3-((3,7-dimethyloct-6-en-1-yl)oxy)prop-1-en-1-yl)benzene, -(3-(cinnamyloxy)butyl)benzene, 1-(3-(2,6-dimethyloctan-2-yloxy)prop-1-enyl)-4-methoxybenzene, 1-(3-(3,7-dimethylocta-1,6-dien-3-yloxy)prop-1-enyl)-4-methoxybenzene, 1-(3-(3,7-dimethyloct-1-en-3-yloxy)prop-1-enyl)-4-methoxybenzene, 1-methoxy-4-( -3-(1 RS,2 SR)-2-pentylcyclopentyloxy)prop-1-enyl)benzene, 4-(3-((2,6-dimethyloct-7-en-2-yl)oxy)prop-1-en-1-yl)-1,2-dimethoxybenzene, -1-methoxy-4-(3-(4-phenylbutan-2-yloxy)prop-1-enyl)benzene, -1-(3-((3,7-dimethyloctan-3-yl)oxy)prop-1-en-1-yl)-4-methoxybenzene or 1-(3-(3,7-dimethyloct-1-en-3-yloxy)prop-1-enyl)-4-methoxybenzene.