Dimeric and Trimeric Hydrolyzable Tannins from Quercus c occifera and Quercus s uber
2002; American Chemical Society; Volume: 65; Issue: 3 Linguagem: Inglês
10.1021/np010465i
ISSN1520-6025
AutoresHideyuki Ito, K. Yamaguchi, Taehoon Kim, Seddik Khennouf, Kamel Gharzouli, Takashi Yoshida,
Tópico(s)Natural product bioactivities and synthesis
ResumoThree new hydrolyzable tannins, cocciferins D(1) (1), D(2) (2), and T(1) (4), were isolated from the leaves of Quercus coccifera. Cocciferin D(2) (2) and two additional new tannins, cocciferins D(3) (3) and T(2) (5), were also obtained from the leaves of Quercus suber. Their oligomeric structures were elucidated on the basis of spectroscopic methods and chemical evidence. Compounds 2, 3, and 5 were rare oligomers possessing glucose cores with both open-chain and pyranose forms.
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