| For Odor | 
| camphoreous | 
butyrophenone FL/FR | 
| chocolate | 
chocolate pyrazine A FL/FR | 
2- methoxy-3-methyl pyrazine FL/FR | 
2,4,5- trimethyl thiazole FL/FR | 
| cocoa | 
2-iso butyl-3,5-(and 3,6)-dimethyl pyrazine FL/FR | 
| fruity | 
nonyl isovalerate FL/FR | 
| musty | 
hazelnut pyrazine FL/FR | 
| nutty | 
2- acetyl-3,5-dimethyl pyrazine FL/FR | 
2- acetyl-3,5(or 6)-dimethyl pyrazine FL/FR | 
3,6- cocoa pyrazine FL/FR | 
filbert heptenone FL/FR | 
filbert heptenone B FL/FR | 
(-)-(E,R)- filbertone FL/FR | 
(E)- filbertone FL/FR | 
(+)-(E,S)- filbertone FL/FR | 
european  hazelnut absolute FL/FR | 
hazelnut fragrance FR | 
european  hazelnut oil CO2 extract FL/FR | 
5- methyl quinoxaline FL/FR | 
2- methyl thio-3,5 or 6-methyl pyrazine FL/FR | 
2- methyl-3-ethoxypyrazine FL/FR | 
2- methyl-3-pentenoic acid FL/FR | 
2,4,5- trimethyl oxazole FL/FR | 
| popcorn | 
2- acetyl pyrazine FL/FR | 
2- acetyl thiazole FL/FR | 
2- acetyl-3,6-dimethyl pyrazine FL/FR | 
| sulfurous | 
2- acetyl thiophene FL/FR | 
| tobacco | 
3- ethyl pyridine FL/FR | 
| For Flavor | 
| No flavor group found for these | 
                                 
2- acetyl-3,6-dimethyl pyrazine FL/FR | 
2-iso butyl-3,5-(and 3,6)-dimethyl pyrazine FL/FR | 
butyrophenone FL/FR | 
chocolate pyrazine A FL/FR | 
chocolate pyrazine B FL | 
4,5- dimethyl-2-ethyl thiazole FL | 
(E)- filbertone FL/FR | 
2- methoxy-6-methyl pyrazine FL | 
2- methyl-3-ethoxypyrazine FL/FR | 
2- methyl-3-pentenoic acid FL/FR | 
nonyl isovalerate FL/FR | 
2- propyl-3,5-dimethyl pyrazine FL | 
pyrazine FL | 
| alliaceous | 
| alliaceous | 
3- mercapto-2-pentanone FL | 
| astringent | 
2- methyl pyridine FL | 
| bitter | 
methyl ethoxypyrazine FL | 
| burnt | 
2- methyl quinoxaline FL | 
2,4,5- trimethyl oxazole FL/FR | 
| caramellic | 
3- ethyl pyridine FL/FR | 
| corn chip | 
2- acetyl thiazole FL/FR | 
| earthy | 
(±)-2- mercapto-5-methylheptan-4-one FL | 
| green | 
2,5- dimethyl-4-ethyl oxazole FL | 
3- methyl pyridine FL | 
1-(5- methyl-2-furyl) propan-1-one FL | 
| musty | 
hazelnut pyrazine FL/FR | 
| nutty | 
3- acetyl-2,5-dimethyl thiophene FL | 
2- acetyl-3,5-dimethyl pyrazine FL/FR | 
2- acetyl-3,5(or 6)-dimethyl pyrazine FL/FR | 
almond hazelnut flavor FL | 
3,6- cocoa pyrazine FL/FR | 
3,5(6)- cocoa pyrazine FL | 
2,5- diethyl pyrazine FL | 
2,5- diethyl-3-methyl pyrazine FL | 
2- ethyl-6-methyl pyrazine FL | 
filbert heptenone FL/FR | 
filbert heptenone B FL/FR | 
(-)-(E,R)- filbertone FL/FR | 
(+)-(E,S)- filbertone FL/FR | 
european  hazelnut absolute FL/FR | 
toasted  hazelnut cream flavor FL | 
european  hazelnut distillates FL | 
hazelnut flavor FL | 
european  hazelnut oil CO2 extract FL/FR | 
european  hazelnut oleoresin FL | 
hazelnut paste FL | 
2- methoxy-3-methyl pyrazine FL/FR | 
5- methyl quinoxaline FL/FR | 
2- methyl thio-3,5 or 6-methyl pyrazine FL/FR | 
2,4,5- trimethyl thiazole FL/FR | 
| onion | 
2- acetyl thiophene FL/FR | 
| roasted | 
2- acetyl pyrazine FL/FR | 
| spicy | 
chocolate cinnamon hazelnut flavor FL | 
cinnamon hazelnut cappuccino flavor FL | 
cinnamon hazelnut cream flavor FL | 
| vanilla | 
vanilla hazelnut flavor FL |