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Flavan and procyanidin glycosides from the bark of blackjack oakAuthor(s): Young-Soo Bae; Johann F.W. Burger; Jan P. Steynberg; Daniel Ferreira; Richard W. Hemingway
Source: Phytochemistry 35(2):472-478
Publication Series: Miscellaneous Publication
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DescriptionThe bark of blackjack oak contains (+)-catechin, (-)-epicatechin, (+)-3-O-[β-D-glucopyranosyl]-catechin, catechin-(4α→8}-catechin, epicatechin-(4β→8}-catechin as well as the novel 3-0-[β-D-glucopyranosyl]-catechin-(4α→8)-catechin and 3-0-[α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranosyl]-catechin, as major components. The latter rutinoside of catechin is especially interesting because of the exceptionally small J2.3 C-ring coupling. The glucoside of catechin-(4α→8)-catechin is only the second proanthacyanidin found in nature in which a 3-0-glycoside is present in the upper 'extender unit' of a dimer.
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CitationBae, Young-Soo; Burger, Johann F.W.; Steynberg, Jan P.; Ferreira, Daniel; Hemingway, Richard W. 1994. Flavan and procyanidin glycosides from the bark of blackjack oak. Phytochemistry 35(2):472-478
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