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Epicatechin-(4beta->8)-epicatechin-(4beta->8)-catechin is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Epicatechin-(4beta->8)-epicatechin-(4beta->8)-catechin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Epicatechin-(4beta->8)-epicatechin-(4beta->8)-catechin can be found in common grape, which makes epicatechin-(4beta->8)-epicatechin-(4beta->8)-catechin a potential biomarker for the consumption of this food product.

Epicatechin-(4beta->8)-epicatechin-(4beta->6)-catechin is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Epicatechin-(4beta->8)-epicatechin-(4beta->6)-catechin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Epicatechin-(4beta->8)-epicatechin-(4beta->6)-catechin can be found in common grape, which makes epicatechin-(4beta->8)-epicatechin-(4beta->6)-catechin a potential biomarker for the consumption of this food product.

Procyanidin C1 is found in apple. Proanthocyanidin C1 is a B type proanthocyanidin. It is an epicatechin trimer found in grape (Vitis vinifera). (Wikipedia).

Robinetinidol-(4alpha->8)-catechin-(6->4alpha)-robinetinidol

Procyanidin trimer eec is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Procyanidin trimer eec is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Procyanidin trimer eec can be found in a number of food items such as strawberry, cucurbita (gourd), green bean, and rubus (blackberry, raspberry), which makes procyanidin trimer eec a potential biomarker for the consumption of these food products.

Epicatechin-(4beta->6)-epicatechin-(4beta->8)-epicatechin is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Epicatechin-(4beta->6)-epicatechin-(4beta->8)-epicatechin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Epicatechin-(4beta->6)-epicatechin-(4beta->8)-epicatechin can be found in common grape, which makes epicatechin-(4beta->6)-epicatechin-(4beta->8)-epicatechin a potential biomarker for the consumption of this food product.

Epicatechin-(4beta->6)-epicatechin-(4beta->8)-catechin is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Epicatechin-(4beta->6)-epicatechin-(4beta->8)-catechin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Epicatechin-(4beta->6)-epicatechin-(4beta->8)-catechin can be found in common grape, which makes epicatechin-(4beta->6)-epicatechin-(4beta->8)-catechin a potential biomarker for the consumption of this food product.

Epicatechin-(4beta->8)-epicatechin-(4beta->6)-epicatechin is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Epicatechin-(4beta->8)-epicatechin-(4beta->6)-epicatechin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Epicatechin-(4beta->8)-epicatechin-(4beta->6)-epicatechin can be found in apple and common grape, which makes epicatechin-(4beta->8)-epicatechin-(4beta->6)-epicatechin a potential biomarker for the consumption of these food products.

Arecatannin b1 is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Arecatannin b1 is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Arecatannin b1 can be found in common grape, which makes arecatannin b1 a potential biomarker for the consumption of this food product.

Arecatannin a1 is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Arecatannin a1 is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Arecatannin a1 can be found in common grape and grape wine, which makes arecatannin a1 a potential biomarker for the consumption of these food products.

Procyanidin c2, also known as C-(4,8)-C-(4,8)-C or procyanidin trimer c2, is a member of the class of compounds known as biflavonoids and polyflavonoids. Biflavonoids and polyflavonoids are organic compounds containing at least two flavan/flavone units. These units are usually linked through CC or C-O-C bonds. Some examples include C2-O-C3, C2-O-C4, C3'-C3''', and C6-C8''. Procyanidin c2 is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). Procyanidin c2 can be found in barley, beer, and common grape, which makes procyanidin c2 a potential biomarker for the consumption of these food products.

A proanthocyanidin consisting of two (-)-epicatechin and one (+)-catechin units joined in sequence by (4beta->8)- and (4beta->6)-linkages." []

A proanthocyanidin consisting of three (+)-catechin trimer joined by two successive (4alpha->8)-linkages." []