| Primary (First) - astringent |
| | 4- | benzoyl pyridine |
| | flavor: astringent bitter musty |
| FL | | caffeine |
| | flavor: astringent |
| FL | red | cinchona succirubra bark extract |
| | flavor: astringent woody herbal tea peppery hay |
| FL | 2,3- | dimethyl quinoxaline |
| | flavor: astringent fatty earthy |
| | 1- | furfuryl-pyrrole-3-aldehyde |
| | flavor: astringent, bitter |
| FL | 2- | methyl pyridine |
| | flavor: astringent hazelnut nutty |
| | N- | methyl-pyrryl-2 furfuryl sulfide |
| | flavor: astringent, sulfurous, green |
| FL | | paullinia cupana seed extract |
| | odor: rooty cocoa tobacco |
| | flavor: astringent bitter cereal nutty cocoa woody rooty |
| | 1- | propanoyl pyrrole |
| | flavor: astringent, peanut, roasted |
| | 2-( | pyridyl-2)-ethanethiol acetate |
| | flavor: astringent, roasted |
| | 2-( | pyridyl-2)-ethyl ethyl sulfide |
| | flavor: astringent, fatty, green |
| | 2-( | pyridyl-2)-ethyl furfuryl sulfide |
| | flavor: astringent, green |
| | 1-( | thienyl-2)butan-1,2-dione |
| | flavor: astringent, fruity, green |
| Secondary (Second) - astringent |
| FL/FR | alpha- | amyl cinnamyl alcohol |
| | odor: floral jasmin waxy |
| | flavor: Sweet, spicy, astringent, green, floral and rosy |
| | ( | bensofurfuryl-2)-thiol acetate |
| | ( | benzofuryl-2)-methylthiol acetate |
| | flavor: metallic, astringent, earthy |
| | 2- | benzyl pyridine |
| | flavor: green astringent |
| FR | | cassis buteneone |
| | odor: fruity sweet rose natural petal cassis black currant |
| | flavor: woody astringent berry spice |
| FD | red | cinchona bark |
| | odor: brown maple woody botanical rooty |
| | flavor: bitter astringent maple brown tea woody |
| FL/FR | | coffee furanone |
| | odor: sweet solvent bread buttery nutty |
| | flavor: Nutty and astringent with a slight, creamy almond nuance |
| FL/FR | delta- | damascone |
| | odor: fruity sweet rose natural petal cassis black currant tobacco |
| | flavor: Woody, astringent, berry with a slight spice nuance |
| | 2-(2- | ethoxyethyl) pyridine |
| | flavor: bitter, astringent, basic |
| FL | | euterpe oleracea fruit extract |
| | flavor: fleshy raisin berry |
| FL | | formic acid |
| | odor: pungent vinegar formyl |
| | flavor: Acetic, astringent, fruity, mustard, bready, with a pyruvic acid nuance |
| CS | | hibiscus rosa-sinensis flower extract |
| | flavor: acidic astringent cooked fruity vegetable |
| | 2- | methyl-3-isopropyl quinoxaline |
| | flavor: bitter astringent |
| FL | | pomegranate flavor |
| CS | 3- | pyridine carboxaldehyde |
| | flavor: bitter astringent |
| | 2-( | pyridyl-2)-ethanethiol |
| | flavor: roasted, astringent, earthy |
| FL | | quassia amara bark extract |
| | odor: woody phenolic animal bitter chemical burnt medicinal balsamic |
| | flavor: bitter astringent medicinal fruity herbal green earthy |
| Tertiary (Third) - astringent |
| | 4-( | azetidine-1-carbonyl)-1-(2-isopropyl-5-methyl cyclohexyl) pyrrolidin-2-one |
| | flavor: mild cooling, earthy, off-flavor, not bitter, napthalene, herbaceous, slight tingle effect on the tip of tongue, and garden hose, carrot, astringent, and waxy effect |
| FL | | burnt flavor |
| FL/FR | roasted arabica | coffee bean oil |
| | odor: dark roast brewed coffee |
| | flavor: Beany roasted coffee with an astringent brown bitter afternote |
| FL | | cola acuminata seed tincture |
| | flavor: spicy woody astringent |
| FL | | elder berry flavor |
| FL/FR | 2- | hydroxybenzaldehyde |
| | odor: Medicinal, spicy cinnamon-wintergreen like cooling note |
| | flavor: Spicy, medicinal and astringent |
| FL/FR | | jambu oleoresin |
| | odor: Citrus, herbal, lifting, tropical with a musty coolingness |
| | flavor: Strangely effervescent, cooling, salty, slightly astringent and numbing |
| FL/FR | 2,5- | xylenol |
| | odor: Sweet, naphthyl, phenolic, smoke, bacon and Iysol-like |
| | flavor: Musty, chemical, stringent and phenolic |
| Quaternary (Fourth) - astringent |
| FL/FR | alpha- | dihydroterpineol |
| | odor: sweet pine terpenic lime woody |
| | flavor: woody terpenic lime astringent herbal earthy humus rooty |
| FL | | elder flower flavor |
| FL | | elderflower distillates |
| | odor: elderflower floral |
| | flavor: elderflower |
| FL/FR | | guaiacyl acetate |
| | odor: sweet woody spice dry clove powdery smoky |
| | flavor: Woody, guaiacol, smoky, astringent and phenolic with vanillin and coumarin nuances |
| FR | | ilex paraguariensis leaf solid extract |
| | odor: tea brown sweet leafy hay earthy vegetable |
| | flavor: herbal tea brown astringent leafy hay spice |
| FL/FR | | immortelle absolute |
| | odor: warm sweet caramel hay fruity honey tobacco tonka |
| | flavor: Green, tobacco, bitter, with an astringent brown fruity nuance, incense notes |
| FL | | panax quinquefolius root extract |
| | odor: linalool citrus fresh |
| | flavor: earthy vegetable rooty astringent |
| FL | | secale cereale seed extract |
| | flavor: maple brown hay fermented astringent floral |
| FL | | tobacco flavor |
| FL/FR | | tobacco leaf absolute |
| | odor: sweet hay tobacco moss leafy herbal old wood dried fruit tea honey |
| | flavor: grassy leafy tea astringent hay tobacco brown dried fruit resinous |
| Quinary (Fifth) - astringent |
| | | bornyl ethyl ether |
| | odor: camphoreous woody cedarwood eucalyptus blueberry |
| FL/FR | 2- | methyl pyrazine |
| | odor: Nutty, brown, nut skin, musty, pyrazine and earthy with a slight roasted nuance |
| | flavor: Nutty, brown, roasted, musty and astringent |
| FL | | salacca zalacca fruit |
| | flavor: apple, pear, pineapple and lychee, with a bit of an astringent note |
| FL | | snake fruit flavor |
| FL | | tamarindus indica extract |
| | odor: sweet sour fruity |
| | flavor: fruity jammy acidic dried fruit astringent sour |
| Senary (Sixth) - astringent |
| FL | | tamarind flavor |
| Septenary (Seventh) - astringent |
| FR | | guaiacwood extract acetate |
| | odor: woody vetiver balsamic tea rose |
| | flavor: aromatic burnt fruity meaty woody smoky astringent vanilla coumarinic |
| Octonary (Eighth) - astringent |
| FL/FR | | furfural |
| | odor: sweet woody almond fragrant baked bread |
| | flavor: Brown, sweet, woody, bready, nutty, caramellic with a burnt astringent nuance |