| Primary (First) - fennel |
| | alpha- | allyl-4-methyl-3-cyclohexene methanol |
| | odor: sweet, fennel, anise- like, licorice-like and green aroma |
| | flavor: sweet, fennel, anise-like, licorice- like and green flavor |
| FL/FR | | amyl furoate |
| | odor: fennel mild oily fruity herbal |
| FR | bitter | fennel absolute |
| | odor: fennel |
| FL/FR | sweet | fennel absolute |
| | odor: anise licorice |
| | flavor: fennel |
| | bitter | fennel flower oil lithuania |
| | odor: licorice |
| FL/FR | sweet | fennel oleoresin |
| | odor: fennel |
| | flavor: fennel |
| FL | sweet | fennel seed |
| | odor: fennel |
| | flavor: fennel |
| FR | bitter | fennel seed oil |
| | odor: minty |
| FL/FR | sweet | fennel seed oil |
| | odor: sweet earthy anise green peppery herbal spicy |
| | flavor: Sweet, anise / anethole-like with a green herbal background |
| FR | bitter | fennel seed oil (foeniculum vulgare capillaceum) |
| | odor: fennel |
| FR | bitter | fennel seed oil CO2 extract |
| | odor: sharp peppery camphor spicy sweet |
| FL/FR | sweet | fennel seed oil CO2 extract |
| | odor: fennel |
| | flavor: fennel |
| CS | bitter | fennel seed oil lithuania |
| | odor: licorice |
| FR | bitter | fennel seed oil spain |
| | odor: sharp peppery camphor spicy sweet |
| FR | | foeniculum vulgare capillaceum fruit extract |
| | odor: fennel |
| FL | | foeniculum vulgare fruit |
| | odor: sweet green anethol herbal |
| | flavor: fennel |
| FL/FR | | foeniculum vulgare fruit extract |
| | odor: fennel |
| | flavor: fennel |
| FL/FR | | foeniculum vulgare mill. var. dulce d.c. fruit extract |
| | odor: fennel |
| | flavor: fennel |
| FR | | foeniculum vulgare piperitum fruit extract |
| | odor: fennel |
| FL/FR | | foeniculum vulgare vulgare fruit extract |
| | odor: fennel |
| | flavor: fennel |
| Secondary (Second) - fennel |
| FR | | fennel fragrance |
| | odor: sweet anise fennel woody earthy green spicy caraway |
| Tertiary (Third) - fennel |
| FL | | amyl 2-furoate |
| | odor: caramellic winey fennel |
| | flavor: fennel oily |
| FR | | cedarwood oil port orford |
| | odor: sweet woody pine fennel herbal |
| FL/FR | para- | dimethyl hydroquinone |
| | odor: sweet green new mown hay fennel |
| | flavor: sweet green hawthorn new mown hay anisic anise fennel powdery fatty |
| FL/FR | | ethyl para-anisate |
| | odor: Sweet anisic, licorice, fruity, spice, cherry, floral and powdery |
| | flavor: Anise, sweet, fruity, licorice, grape and cherry like |
| FL/FR | | hotrienol |
| | odor: sweet tropical ocimene fennel ginger myrcene |
| | flavor: fresh floral woody |
| | laevo- | pinocarveol |
| | odor: warm woody balsamic fennel |
| Quaternary (Fourth) - fennel |
| FR | para- | anisyl propanal |
| | odor: sweet aniseed basil fennel raspberry green |
| FR | | licorice diethyl acetal |
| | odor: fruity herbal anise basil fennel hyacinth |
| Quinary (Fifth) - fennel |
| FL/FR | sweet | basil oleoresin |
| | odor: basil minty green tea tarragon fennel spicy |
| | flavor: sweet licorice tarragon root beer spicy resinous |
| FL/FR | | dihydroanethol |
| | odor: sweet anise licorice sassafrass fennel |
| | flavor: Intense herbal fennel sweetness reminiscent of black licorice, sassafras and anise. It has slight spicy basil-like nuances |
| Senary (Sixth) - fennel |
| FL/FR | | estragole |
| | odor: sweet sassafrass anise spice green herbal fennel |
| | flavor: Sweet, licorice, phenolic, weedy, spice, celery-like |
| FL/FR | (Z)-3- | hexen-1-yl (Z)-3-hexenoate |
| | odor: green tomato leaf pear melon metallic fennel tropical |
| | flavor: green fruity pear melon tropical banana peel tomato leaf metallic |
| Septenary (Seventh) - fennel |
| Octonary (Eighth) - fennel |
| FL/FR | para- | anisyl methyl ketone |
| | odor: sweet fruity creamy spicy green anisic balsamic licorice fennel |
| | flavor: sweet spicy anisic fennel licorice green grassy minty root beer |
| FL/FR | | ethyl citronellate |
| | odor: fruity dry dusty citrus sweet licorice rose spicy fennel |
| | flavor: sweet dusty dry anise licorice fennel weedy |
| FL | 4- | methyl biphenyl |
| | odor: Floral, spicy, wintergreen, estragole and waxy with cooling, minty nuances |
| | flavor: Spicy, estragole, fennel, floral and wintergreen |