Agent for inhibiting odor of pyrazine derivatives

A method of antagonizing responses of an olfactory receptor OR5K1, wherein the method includes applying, to an olfactory receptor OR5K1, at least one compound selected from the group consisting of the following compounds:

• 2-ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol;
• 5-methyl-2-(1-methylethyl)-phenol;
• 3,7-dimethyl-2,6-octadienal;
• phenylethyl salicylate;
• 1-(5,6,7,8-tetrahydro-3,5,5,6,8,8-hexamethyl-2-naphthalenyl)-ethanone;
• isolongifolanone;
• 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one (α-ionone);
• 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-buten-2-one (β-ionone);
• vetiverol;
• 7-acetyl-1,2,3,4,5,6,7,8-octahydro-1,1,6,7-tetramethyl-naphthalene;
• α-amylcinnamic aldehyde;
• α-methyl-4-(1-methylethyl)-benzenepropanal;
• 4-methyl-3-decen-5-ol;
• 1-(2-tert-butylcyclohexyloxy)-2-butanol;
• 2-methoxy-1-(phenylmethoxy)-4-(1-propenyl)-benzene;
• α-methyl-β-(p-tert-butylphenyl)-propionaldehyde;
• l(−)-menthol;
• ω-6-hexadecenelactone;
• 2-(2-(4-methyl)-3-cyclohexen-1-yl)-propylcyclopentanone;
• formaldehyde cyclododecyl ethyl acetal;
• 1-(2,3,4,7,8,8a-hexahydro-3,6,8,8-tetramethyl-1H-3a,7-methanoazulen-5-yl)-ethanone;
• β-methyl naphthyl ketone;
• cedryl acetate;
• (5E)-3-methylcyclopenta-5-decen-1-one;
• cinnamaldehyde;
• 4-(1-ethoxyvinyl)-3,3,5,5-tetramethylcyclohexanone;
• α-hexylcinnamic aldehyde;
• 2-phenylpropionaldehyde;
• 3,7-dimethyl-6-octenal;
• dodecahydro-3a,6,6,9a-tetramethylnaphtho[2,1-b]furan;
• 4,7,7-trimethyl-spirobicyclo[2.2.1]heptane-2,1-cyclopentan-3-one;
• α-isomethyl ionone;
• 3,7-dimethyl-1-octanol;
• cedryl methyl ether;
• muscone;
• 2-methyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol;
• 2-cyclohexylpropanal;
• γ-undecalactone;
• cyclopentadecanolide;
• 1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one;
• 2,4-dimethyl-3-cyclohexene-1-carboxyaldehyde;
• 2,4,6-trimethyl-3-cyclohexene-1-carboxyaldehyde;
• 3,5,6-trimethyl-3-cyclohexene-1-carboxyaldehyde;
• 6,10-dimethyl-3-oxa-9-undecenal;
• dimethyl benzyl carbinyl acetate;
• ethyl-(3aα,4α,7α,3aα)-octahydro-4,7-methano-3aH-indene-3a-carboxylate;
• 2-pentyl-3-methyl-2-cyclopenten-1-one;
• phenylhexanol;
• 1-(5,5-dimethyl-1-cyclohexen-1-yl)-4-penten-1-one;
• 6-tert-butyl-1,1-dimethylinden-4-yl methyl ketone;
• cis-4-isopropylcyclohexylmethanol;
• 1-allyl-3-methoxy-4-hydroxybenzene;
• (E)-3,7-dimethyl-2,6-octadien-1-ol;
• 4-tert-butyl-2,6-dimethyl-3,5-dinitroacetophenone;
• 1,4-dioxacycloheptadecane-5,17-dione;
• hexyl salicylate;
• and
• α-methyl-3,4-methylenedioxyhydrocinnamic aldehyde.