Flavonoids and Condensed Tannins from Leaves of Hawaiian Vaccinium reticulatum and V. calycinum (Ericaceae)
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1994-10
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University of Hawaii Press
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Abstract
The flavonoids and condensed tannins of Hawaiian Vaccinium
reticulatum Smith and V. calycinum Smith have been isolated and their structures
determined. Flavonoids present in both species were quercetin, quercetin-3-
0-glucoside, quercetin-3-0-galactoside, quercetin-3-0-methyl ether, isorhamnetin,
and (-)-epicatechin. The condensed tannin contained procyanidin units
with cis stereochemistry only. Extension and terminal units, and number-average
molecular weight of the polymer were determined. A large quantity of
neochlorogenic acid (a caffeic acid derivative) was also detected. The phenolic
compounds of V reticulatum from a population on Mauna Kea and two populations
near K11auea, both on the island of Hawai'i, and from one population
of V calycinum on Kaua'i were qualitatively identical. The high degree of
similarity supports the view that these species are closely related. It is suggested
that the phenolic chemistry of the species may have been fixed in the progenitor
of the Hawaiian Vaccinium.
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Bohm BA, Koupai-Abyazani MR. 1994. Flavonoids and condensed tannins from leaves of Hawaiian Vaccinium reticulatum and V. calycinum (Ericaceae). Pac Sci 48(4): 458-463.
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