| Primary (First) - hazelnut |
| | 2- | acetonyl pyrazine |
| | flavor: slight nutty hazelnut |
| FL/FR | 2- | acetyl-3,5-dimethyl pyrazine |
| | odor: nutty roasted hazelnut |
| | flavor: nutty roasted hazelnut |
| FL | 3- | acetyl-2,5-dimethyl thiophene |
| | odor: burnt roasted meaty |
| | flavor: sweet dried hazelnut almond marzipan |
| FL | 3- | acetyl-2,5-dimethyl thiophene |
| | odor: burnt roasted meaty |
| | flavor: sweet dried hazelnut almond marzipan |
| FL/FR | 3,6- | cocoa pyrazine |
| | odor: potato cocoa roasted nutty |
| | flavor: hazelnut |
| FL | 2,5- | diethyl-3-methyl pyrazine |
| | odor: toasted hazelnut meaty |
| | flavor: hazelnut burnt |
| FL | 2,5- | diethyl-3-methyl pyrazine |
| | odor: toasted hazelnut meaty |
| | flavor: hazelnut burnt |
| FL | 2,5- | diethyl pyrazine |
| | flavor: nutty hazelnut |
| | 2,6- | diethyl pyrazine |
| | flavor: nutty hazelnut |
| | 2,5- | dimethyl-3,6-dipropyl pyrazine |
| | flavor: hazelnut acidic |
| FL | 2- | ethyl-6-methyl pyrazine |
| | odor: roasted potato |
| | flavor: roasted hazelnut |
| FL/FR | | filbert heptenone |
| | odor: raw nut skin myrcene ketonic sweet hazelnut filbert |
| | flavor: Nutty, roasted, coffee, cocoa, brown with an earthy brown and meaty nuance |
| FL/FR | | filbert heptenone B |
| | odor: nutty hazelnut |
| | flavor: nutty |
| FL/FR | (-)-(E,R)- | filbertone |
| | odor: hazelnut soft butter chocolate metallic |
| | flavor: hazelnut |
| FL/FR | (+)-(E,S)- | filbertone |
| | odor: hazelnut metallic fatty pyidine |
| | flavor: hazelnut |
| FL/FR | european | hazelnut absolute |
| | odor: hazelnut |
| | flavor: hazelnut |
| FL | | hazelnut cappuccino flavor |
| FL | | hazelnut cream flavor |
| FL | toasted | hazelnut cream flavor |
| FL | european | hazelnut distillates |
| | flavor: nutty hazelnut |
| FL | | hazelnut flavor |
| FL/FR | roasted | hazelnut infusions |
| | odor: nutty hazelnut |
| | flavor: nutty hazelnut |
| FL/FR | roasted | hazelnut infusions |
| | odor: nutty hazelnut |
| | flavor: nutty hazelnut |
| FL/FR | european | hazelnut oil CO2 extract |
| FL | european | hazelnut oleoresin |
| | flavor: nutty hazelnut |
| FL | european | hazelnut oleoresin |
| | flavor: nutty hazelnut |
| FL | | hazelnut paste |
| | flavor: hazelnut |
| FL | | hazelnut praline flavor |
| FL | | hazelnut vanilla flavor |
| | 4- | hydroxymethyl-pyridine |
| FL | (±)-2- | mercapto-5-methylheptan-4-one |
| | odor: gassy, tropical, grapefruit, muscat grape, grapes on the vine |
| | flavor: mushroom, meaty, roasted, nutty, toasted, and hazelnut |
| | 2-( | methoxymethyl)-6-methyl pyridine |
| | flavor: roasted, hazelnut-like |
| | 2- | methyl-3-ethyl quinoxaline |
| | flavor: hazelnut bitter roasted |
| | 2- | methyl-3-ethyl quinoxaline |
| | flavor: hazelnut bitter roasted |
| | 2- | methyl-3-pentyl pyrazine |
| | flavor: hazelnut, coffee-like |
| FL | 2- | methyl quinoxaline |
| | odor: toasted coffee nutty fruity |
| | flavor: phenolic burnt coffee nutty |
| | 2- | methyl-3-vinyl pyrazine |
| | flavor: fresh hazelnut earthy |
| | 2- | methyl-6-vinyl pyrazine |
| | flavor: hazelnut |
| | 2- | propyl-3,6-dimethyl pyrazine |
| | odor: hazelnut |
| | flavor: hazelnut |
| Secondary (Second) - hazelnut |
| FL/FR | 2- | acetyl-3,5(or 6)-dimethyl pyrazine |
| | odor: nutty roasted hazelnut roasted peanut popcorn corn chip toasted grain nut flesh peanut butter |
| | flavor: nutty roasted hazelnut roasted peanut popcorn toasted grain nut flesh peanut butter |
| FL | | almond hazelnut flavor |
| FL | | chocolate hazelnut flavor |
| FL | white | chocolate hazelnut flavor |
| FL | | cinnamon hazelnut cappuccino flavor |
| FL | | cinnamon hazelnut cream flavor |
| FL | | cinnamon hazelnut flavor |
| FL | | coconut hazelnut flavor |
| FL | 2- | ethyl-6-methyl pyrazine |
| | odor: roasted potato |
| | flavor: roasted hazelnut |
| | 2- | ethyl-3-vinyl pyrazine |
| | flavor: earthy hazelnut burnt |
| FL | | filbert flavor |
| | 2-( | methoxymethyl)-6-methyl pyridine |
| | flavor: roasted, hazelnut-like |
| FL/FR | | methyl benzoxole |
| | odor: tobacco burnt phenolic meaty powdery capers |
| | flavor: nutty hazelnut tobacco burnt meaty brothy roasted phenolic |
| FL | 1-(5- | methyl-2-furyl) propan-1-one |
| | flavor: green, hazelnut-like |
| | 2- | methyl-6-propyl pyrazine |
| | flavor: burnt hazelnut |
| FL | 2- | methyl pyridine |
| | flavor: astringent hazelnut nutty |
| FL | | raspberry hazelnut flavor |
| | 2,3,5- | trimethyl-6-hexyl pyrazine |
| | flavor: fatty hazelnut |
| FL | | vanilla hazelnut flavor |
| Tertiary (Third) - hazelnut |
| FL/FR | 2- | acetyl-3,5-dimethyl pyrazine |
| | odor: nutty roasted hazelnut |
| | flavor: nutty roasted hazelnut |
| FL/FR | 2- | acetyl-3-methyl pyrazine |
| | odor: nutty nut flesh roasted hazelnut toasted grain corn chip vegetable nut skin caramellic |
| | flavor: nutty nut flesh roasted hazelnut toasted grain potato chip baked potato nut skin vegetable |
| FL | | chocolate cinnamon hazelnut flavor |
| FL | 2,5- | dimethyl-4-ethyl oxazole |
| | odor: burnt roasted |
| | flavor: green ethereal hazelnut |
| FL/FR | 3- | ethyl pyridine |
| | odor: tobacco oakmoss leather |
| | flavor: caramellic roasted hazelnut |
| | 7- | methyl benzofuran |
| | flavor: earthy mushroom hazelnut |
| FL | 3- | methyl pyridine |
| | flavor: green earthy hazelnut |
| FL/FR | 2,4,5- | trimethyl oxazole |
| | odor: nutty nut skin roasted wasabi shellfish mustard vegetable |
| | flavor: burnt nutty hazelnut oily nut skin potato earthy mushroom |
| Quaternary (Fourth) - hazelnut |
| Quinary (Fifth) - hazelnut |
| FL/FR | | allyl 2-ethyl butyrate |
| | odor: nut fruit peach-pit cherry-pit ethereal |
| | flavor: ethereal fruity green nutty hazelnut seedy macadamia nut flesh |
| FL | 3,5(6)- | cocoa pyrazine |
| | odor: nutty nut skin hazelnut peanut chocolate roasted |
| | flavor: Peanut, nut skin, brown, roasted, hazelnut, with coffee and chocolate nuances |
| Senary (Sixth) - hazelnut |
| Septenary (Seventh) - hazelnut |
| Octonary (Eighth) - hazelnut |