| Primary (First) - hazelnut roasted 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 | 2,5- | diethyl-3-methyl pyrazine |
| | odor: toasted hazelnut meaty |
| | flavor: hazelnut burnt |
| FL | 2- | ethyl-6-methyl pyrazine |
| | odor: roasted potato |
| | flavor: roasted hazelnut |
| FL | toasted | hazelnut cream flavor |
| FL/FR | roasted | hazelnut infusions |
| | odor: nutty hazelnut |
| | flavor: nutty hazelnut |
| FL | european | hazelnut oleoresin |
| | flavor: nutty hazelnut |
| | 2-( | methoxymethyl)-6-methyl pyridine |
| | flavor: roasted, hazelnut-like |
| | 2- | methyl-3-ethyl quinoxaline |
| | flavor: hazelnut bitter roasted |
| Secondary (Second) - hazelnut roasted 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 |
| Tertiary (Third) - hazelnut 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/FR | 3- | ethyl pyridine |
| | odor: tobacco oakmoss leather |
| | flavor: caramellic roasted hazelnut |
| Quaternary (Fourth) - hazelnut roasted hazelnut |
| Quinary (Fifth) - hazelnut roasted hazelnut |
| 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 roasted hazelnut |
| Septenary (Seventh) - hazelnut roasted hazelnut |
| Octonary (Eighth) - hazelnut roasted hazelnut |