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Flavor Descriptors for bitter
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Primary (First) - bitter
FL2-acetyl-5-methyl pyrrole
 odor: earthy roasted
 flavor: bitter earthy roasted
FL amarogentin
 flavor: very bitter
FL(2S,5R)-N-[4-(2-amino-2-oxoethyl)phenyl]-5-methyl-2-(propan-2-yl)cyclohexanecarboxamide
 flavor: moderate throat and mouth cooling that lingers with some bitter notes in background. Cooling lasts with breath in for 30 minutes.
FL angostura bark oil
 flavor: burning bitter
4-(azepane-1-carbonyl)-1-(2-isopropyl-5-methyl cyclohexyl) pyrrolidin-2-one
 flavor: bitterness and cooling effect and both built up
2-benzoyl pyridine
 flavor: bitter musty
4-benzyl pyridine
 flavor: bitter
 benzyl sulfide
 flavor: bitter roasted
FL bitters flavor
1-(2-tert-butyl cyclohexyl)-4-(piperidine-1-carbonyl) pyrrolidin-2-one
 flavor: some bitterness and drying, powdery, and minimal cooling effect
1-(2-tert-butyl cyclohexyl)-4-(pyrrolidine-1-carbonyl) pyrrolidin-2-one
 flavor: upfront bitterness, quinine, drying, greasy, and burning effect
FDred cinchona bark
 odor: brown maple woody botanical rooty
 flavor: bitter astringent maple brown tea woody
FL cocoa distillates
 odor: sweet sulfury cocoa nutty chocolate creamy
 flavor: cocoa
FL/FR cocoa hexenal
 odor: aldehydic bitter cocoa nut skin green sweet chocolate fruity butyric
 flavor: Bitter cocoa, honey, aldehydic, coffee and nutty with a green nuance
FL/FR cocoa oleoresin
 odor: dark bitter cocoa chocolate
 flavor: Dark powdery cocoa
FL cocoa pyrazines base (mixture of pyrazines)
 odor: nutty bitter chocolate
 flavor: bitter nutty chocolate
2,6-diacetyl pyridine
 flavor: bitter, coffee-like
FL/FR dibenzyl ketone
 odor: bitter almond benzaldehyde plastic seedy
 flavor: Bitter with floral, rose and honey notes
2,3-diethyl quinoxaline
 flavor: bitter earthy
FL3,4-dihydroxybenzaldehyde
 odor: dry medicinal bitter almond
 flavor: bitter apricot seed
2,6-dimethyl-dithio-gamma-pyrone
 flavor: bitter
2-(2-ethoxyethyl) pyridine
 flavor: bitter, astringent, basic
FL/FR fenugreek oleoresin
 odor: sweet maple lovage caramel cocoa
 flavor: Bitter, brown, maple, lovage with a coffee nuance
FL/FR frankincense gum papyrifera
 odor: woody incense woody
 flavor: bitter
FD glucose pentaacetate
 flavor: Bitters-like, with a citrus tonic flavor
FL glyceryl tributyrate
 odor: Cheese, waxy, fatty, acidic
 flavor: Bitter, waxy, fatty, cheese and butter nuances
 helenalin
 flavor: bitter
2-hydroxymethyl-6-methyl-pyridine
 flavor: bitter, burnt, coffee-like
FLbitter lemon flavor
FDdextro,laevo-isoleucine
 flavor: bitter
2-methyl-5-acetyl-pyrrole
 flavor: bitter, earthy, roasted
7-methyl-1-benzofuran-2-carbaldehyde
 flavor: bitter, earthy
2-methyl-3-butyl quinoxaline
 flavor: bitter acidic woody
2-methyl-3-isobutyl quinoxaline
 flavor: bitter earthy woody
1-(2-methyl cyclohexyl)-5-oxopyrrolidine-3-carboxylic acid methyl ester
 flavor: slight upfront bitterness for .about.20-30 seconds and mild cooling effect that slightly built up in a few minutes
FL methyl ethoxypyrazine
 odor: nutty hazelnut nut skin almond earthy pineapple
 flavor: bitter, fruity, anise-like
4-(5-methyl-2-furyl)-2-butanone
 flavor: bitter, roasted
2-methyl-3-pentyl quinoxaline
 flavor: bitter earthy fatty
2-methyl-3-propyl quinoxaline
 flavor: bitter acidic earthy
2-methyl-3-isopropyl quinoxaline
 flavor: bitter astringent
2-methyl-6-vinyl pyridine
 flavor: bitter earthy roasted
CS nicotinyl alcohol
 flavor: bitter, green
FL1,3-octane diol
 flavor: bitter
FLbitter orange flavor
FL/FRbitter orange peel oil brazil
 odor: citrus orange dry woody cognac
 flavor: Bitter, fruity, Madeira, cognac and woody with aromatic nuances
FDalpha-dextro-pentaacetyl glucose
 flavor: Bitters-like, with a citrus tonic flavor
FL/FR peru balsam oil
 odor: sweet cinnamic vanilla balsam powdery
 flavor: Bitter, warm, balsamic, cinnamon, woody, vanilla, with leather and spicy nuances
FL/FR peru balsam resinoid
 odor: sweet cinnamic vanilla balsam
 flavor: bitter warm balsam cinnamon woody vanilla leather
FDlaevo-phenyl alanine
 flavor: slightly bitter
4-phenyl pyridine
 flavor: bitter caramellic
1-(2-isopropyl-5-methyl cyclohexyl)-4-(piperidine-1-carbonyl) pyrrolidin-2-one
 flavor: slight upfront bitterness, herbaceous flavor, and built-up cooling effect
1-(2-isopropyl-5-methyl cyclohexyl)-5-(piperidine-1-carbonyl) piperidin-2-one
 flavor: grapefruit-like bitterness, and very mild cooling and drying effect
1-(2-isopropyl-5-methyl cyclohexyl)-5-(pyrrolidine-1-carbonyl) piperidin-2-one
 flavor: slight cooling, and bitter and drying effect
FD propylene glycol diacetate
 odor: fruity acetic
 flavor: bitter sweet
CS3-pyridine carboxaldehyde
 flavor: bitter astringent
2-(pyridyl-2)-methanethiol acetate
 flavor: bitter fatty
2-(pyridyl-2)-methyl methyl sulfide
 flavor: bitter, green, earthy
(pyrrolyl-2)-propan-1,2-dione
 flavor: bitter, roasted peanut
CS quinine
 flavor: bitter
FL terpin anhydrous
 flavor: bitter
FL/FR terpinyl isovalerate
 odor: sweet pine olibanum incense orange
 flavor: bitter apple
FL theobromine
 flavor: bitter
FL/FR tobacco leaf absolute
 odor: sweet hay tobacco moss woody
 flavor: Bitter, astringent, tobacco and hay-like, with a brown dried fruit aftertaste
FL/FR tridecanal
 odor: fresh clean aldehydic soapy citrus petal waxy grapefruit peel
 flavor: bitter insipid waxy citrus peel
FL/FR(E,Z,Z)-2,4,7-tridecatrienal
 odor: citrus peel waxy fatty oily fruity
 flavor: bitter waxy sweet
 trimethyl citrate
 odor: ethereal fruity
 flavor: bitter
Secondary (Second) - bitter
4-benzoyl pyridine
 flavor: astringent bitter musty
FLbitter chocolate flavor
FLbittersweet chocolate flavor
FL/FR citronellyl oxyacetaldehyde
 odor: fresh sweet waxy floral aldehydic honeysuckle muguet
 flavor: Citrus, bitter, floral with a slight soapy and woody nuance
FRisocyclogeraniol (IFF)
 odor: spice floral carnation herbal green woody
 flavor: camphoraceous and bitter flavor
1,2-dimethyl-5-acetyl-pyrrole
 flavor: fatty, bitter, roasted
1-furfuryl-pyrrole-3-aldehyde
 flavor: astringent, bitter
FD glyceryl tripropanoate
 odor: Oily with a slight chemical nuance
 flavor: Oily, bitter with a fatty nutty aftertaste
FL/FR(Z)-jasmone
 odor: woody herbal floral spicy jasmin celery
 flavor: Woody, bitter, tea, with a citrus and floral nuance
FD magnesium sulfate
 flavor: salty bitter
2-methyl-3-ethyl quinoxaline
 flavor: hazelnut bitter roasted
FL/FR nerol
 odor: sweet natural neroli citrus magnolia
 flavor: lemon, bitter, green and fruity with a terpy nuance
FL paullinia cupana seed extract
 odor: rooty cocoa tobacco
 flavor: astringent bitter cereal nutty cocoa woody rooty
2-(pyridyl-2)-ethyl methyl sulfide
 flavor: mushroom, bitter, green
FL quassia amara wood extract
 flavor: earthy bitter
FL/FR terpinyl valerate
 odor: fruity floral
 flavor: apple bitter sweet
FL/FR theobroma cacao extract
 odor: cocoa roasted powdery
 flavor: Cocoa, powdery, bitter, beany, brown and roasted with a yeasty nuance
Tertiary (Third) - bitter
alpha-allyl-4-methyl-3-cyclohexene-1-methanyl acetate
 odor: green, oriental, floral aroma
 flavor: green, floral and bitter flavor
FL/FR gentiana lutea root extract
 flavor: green earthy bitter
FL ginseng distillates
 flavor: ginseng
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 juglans nigra hulls extract
 flavor: brown roasted bitter earthy
FL juglans nigra shell extract
 flavor: brown roasted bitter earthy
FL/FR levisticum officinale root extract
 odor: Sweet, green, celery-like, with a brown herbal nuance
 flavor: Celery-like, with a bitter green and maple botanical nuance
FL/FR prunus serotina bark extract
 flavor: woody fruity bitter
Quaternary (Fourth) - bitter
FL/FR camellia oleifera leaf extract
 flavor: fresh brewed tea green leafy bitter floral
FL/FR coffea arabica seed extract
 odor: coffee mocha
 flavor: coffee
1,8-dimethoxy-para-menthane
 odor: sweet fruity minty green musty
 flavor: nutty fruity minty bitter musty waxy green citrus sweet sandalwood
2-ethyl thiopyridine
 flavor: green, acid, cereal, bitter, sour
FL/FR2-heptanol
 odor: fresh lemon grass herbal sweet floral fruity green
 flavor: fruity green earthy bitter
FL/FRdextro,laevo-muscone
 odor: sweet musk animal powdery fatty natural
 flavor: sweet, musk like, perfume, soapy with woody and bitter nuances
FL/FR(+)-nootkatone
 odor: grapefruit peel citrus gardenia woody
 flavor: Grapefruit, citrus, orange and bitter
Quinary (Fifth) - bitter
FL acer spicatum bark extract
 odor: sweet tobacco maple burnt
 flavor: brown roasted maple woody bitter
FL/FRroasted arabica coffee bean oil
 odor: dark roast brewed coffee
 flavor: Beany roasted coffee with an astringent brown bitter afternote
FL2-methyl thiophene
 odor: sulfurous alliaceous onion roasted green
 flavor: sulfurous roasted green cabbage onion bitter
Senary (Sixth) - bitter
FL peanut oxazole
 odor: Musty, nutty, vegetative, cocoa, brown, bready and caramellic
 flavor: Musty, nutty, cocoa, brown, vegetative and bready with a slight bitter nuance
Septenary (Seventh) - bitter
Octonary (Eighth) - bitter
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