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Anthraquinone glycosides from rhynchotechum VESTITUM fn2 fn2 Part 3 in the series Chemical studies of Chinese medicinal plant Rhynchotechumvestitum. For part 2 see ref. [2]

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Anthraquinone glycosides from rhynchotechum VESTITUM fn2 fn2 Part 3 in the series Chemical studies of Chinese medicinal plant Rhynchotechumvestitum. For part 2 see ref. [2]

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Abstract

A new anthraquinone glycoside was isolated from the hydrophilic fraction of the Chinese medicinal plant Rhynchotechum vestitum. Its structure was determined as damnacanthol-11-O-β-glucoside by spectroscopic evidence. The occurrence of rubiadin-l-methylether-3-O-β-primeveroside, lucidine-3-O-β-primeveroside and rubiadin-3-O-β-primeveroside in the plant is reported for the first time.

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... HPLC-ODS to afford 11 compounds (1–11). Five were identified as the known compounds; asperulosidic acid (6), deacetyl-asperuloside (7), asperuloside (8) (Otsuka et al., 1991 ), secoxyloganin (9) (Calis and Sticher, 1984 ), and lucidine 3-O- b-primeveroside (11) (Lu et al., 1998) by the physical data and spectroscopic evidence. The molecular formula of compound 1 was determined as C 27 H 28 O 15 by HR–FAB mass spectrometry. ...
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From the leaves and branches of Morinda coreia, six compounds [yopaaosides A-C, 10-O-acetylmonotropein, 6-O-acetylscandoside and 3,4,5-trimethoxyphenyl 1-O-beta-apiofuranosyl (1"-->6')-beta-glucopyranoside] have been isolated together with five known compounds. Structural elucidations were based on analyses of physical and spectroscopic data.
... This procedure yielded sixteen pure compounds (1–16), which were full identified by 1D and 2D NMR and HR-MS. The following fifteen known compounds were obtained: the iridoid glycoside deacetylasperulosidic acid (1) (Kamiya et al., 2002; Tzakou et al., 2007) and the anthraquinone lucidin primveroside (2) (Itokawa et al., 1983), rubiadin-l-methyl ether-3-O-b-primeveroside (3)(Lu et al., 1998), damnacanthol (4) (Rath et al., 1995), 3-hydroxy-2-(hydroxymethyl)anthraquinone (5) (Wu et al., 2009), alizarin-1-methyl ether (6) (Rath et al., 1995), morindone 6-O-b-primveroside (7) (Kamiya et al., 2008), rubiadin-1-methyl ether (8) (Rath et al., 1995), anthraquinone-2- carboxylic acid (9) (Zhang et al., 2010), 2-hydroxy-3- methyl-anthraquinone (10) (Fan et al., 2008), lucidin x-methyl ether (11) (Endale et al., 2013), tectoquinone (12) (Rath et al., 1995), morindone (14) (Borroto et al., 2010; Rath et al., 1995), soranjidiol (15) (Boisvert and Brassard, 1988) and 1-hydroxy-2- methylanthraquinone (16) (Itokawa et al., 1989) (Fig. 2). ...
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Perennial or rarely annual herbs, subshrubs, shrubs or rarely small trees; perennial herbs with fibrous roots or with rooting above- or underground stems, rootstocks, rhizomes, scaly rhizomes, or tubers; terrestrial, epiphytic or climbing. Stem erect, ascending, decumbent, creeping, pendulous, or ± absent. Leaves opposite, sometimes in whorls of three or four, or in near-distichous or spiral-alternate arrangement; usually petiolate; stipules absent; lamina usually undivided, rarely lobed or pinnately dissected. Number of leaf pairs sometimes reduced to the cotyledonary pair, with one of the two cotyledons growing up to a large, foliar organ. Indumentum of stem and leaves of glandular and eglandular hairs, rarely absent. Inflorescences a foliose or (rarely) bracteose indeterminate thyrse with axillary pair-flowered cymes; cymes sometimes reduced to solitary flowers; bracteolate or rarely ebracteolate. Flowers usually showy, zoophilous, rarely auto- or cleistogamous, 5- (rarely 4-)merous.
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