SYZYGININ-A AND SYZYGININ-B, 2 ELLAGITANNINS FROM SYZYGIUM-AROMATICUM

Authors
TANAKA T ORII Y NONAKA GI NISHIOKA I KOUNO I
Citation
T. Tanaka et al., SYZYGININ-A AND SYZYGININ-B, 2 ELLAGITANNINS FROM SYZYGIUM-AROMATICUM, Phytochemistry, 43(6), 1996, pp. 1345-1348
Citations number
7
Categorie Soggetti
Plant Sciences
Journal title
Phytochemistry → ACNP
ISSN journal
00319422
Volume
43
Issue
6
Year of publication
1996
Pages
1345 - 1348
Database
ISI
SICI code
0031-9422(1996)43:6<1345:SAS2EF>2.0.ZU;2-X
Abstract
Two new ellagitannins, named syzyginins A and B, were isolated from th e leaves of clove (Syzygium aromaticum.). Syzyginin A was characterize d as O-galloyl-4,6-(S)-tergalloyl-beta-D-glucopyranose. Syzyginin B wa s a novel hydrolysable tannin possessing a new aromatic acyl group, sy zygyl, which has a dibenzo-1,4-dioxin structure probably derived from a tergalloyl group. Structures were established on the basis of chemic al and spectroscopic evidence. Copyright (C) 1996 Elsevier Science Ltd