| Primary (First) - custard |
| FL | | custard flavor |
| Secondary (Second) - custard |
| FL | | acetoin butyrate |
| | odor: fruity cheese acetic creamy dried berry butter |
| | flavor: Creamy mouthfeel with creamy and custard-like notes |
| FL | | banana custard flavor |
| FL | | coconut custard flavor |
| FL | lime | custard flavor |
| FL | | egg custard flavor |
| FL | | lemon custard flavor |
| FL | | vanilla custard flavor |
| Tertiary (Third) - custard |
| FL | | blackberry and cream flavor |
| FL | | caramel custard flavor |
| FL | | flan flavor |
| FL/FR | | vanilla bean absolute CO2 extract (vanilla planifolia) |
| | odor: sweet vanilla toffee custard creamy gourmand balsamic powdery marshmallow |
| | flavor: sweet vanilla tropical custard creamy gourmand balsamic cocoa bitter |
| FL/FR | para- | vanillyl alcohol |
| | odor: sweet creamy vanilla caramellic coconut graham cracker tonka milky powdery |
| | flavor: sweet creamy custard vanilla milky powdery |
| Quaternary (Fourth) - custard |
| FL | | coniferaldehyde |
| | odor: sweet graham cracker cookie bread crust bread baked toasted grain barley roasted barley vanilla custard dairy |
| | flavor: graham cracker cookie bread baked toasted grain custard roasted barley vanilla powdery |
| Quinary (Fifth) - custard |
| FL | | butter cream frosting flavor |
| Senary (Sixth) - custard |
| FL/FR | | amyl cinnamate |
| | odor: balsam amber cocoa bean orchid labdanum |
| | flavor: sweet balsamic orchid cocoa labdanum leathery custard storax |
| FL | | dulce de leche flavor |
| FL/FR | | rice bran absolute |
| | odor: cooked rice hay spicy toasted grain creamy custard nut skin woody powdery |
| | flavor: toasted grain hay nut skin spicy oily custard creamy woody |
| FL/FR | | vanillin 2,3-butylene glycol acetal |
| | odor: vanilla creamy chocolate powdery caramellic dairy custard gourmand balsamic malty |
| | flavor: vanilla chocolate cocoa creamy caramellic powdery custard dairy |
| Septenary (Seventh) - custard |
| Octonary (Eighth) - custard |