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October 1998
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25 Reads
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19 Citations
Phytochemistry
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.
January 1998
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13 Reads
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13 Citations
Phytochemistry
From the hydrophilic fraction of the Chinese medicinal plant Rhynchotechum vestitum, three anthraquinones were isolated. Munjistin-1-O-methyl ether is a new compound, its structure was determined on the basis of spectral analysis. The occurrence of rubiadin-3-O-β-glucoside and lucidin-3-O-β-glucoside in the plant and some of their spectral data are reported.
January 1996
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50 Reads
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40 Citations
Phytochemistry
A new sterol glycoside clerosterol 3β-o-[β-d-glucoside] along with clerosterol, sitosterol, octacosanol and fatty acids has been isolated from the leaves of Clerodendron colebrookianum. Their structures have been characterised by spectral analysis and the C-24 (S/β) configuration in clerosterol was also confirmed.
May 1995
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3 Reads
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16 Citations
Tetrahedron Asymmetry
A simple method for evaluation of the enantiomeric ratio E of kinetic resolutions by using only the extent of substrate conversion c has been developed and verified experimentally.
... 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). ...
October 1998
Phytochemistry
... Liu et al. (1990) discovered a new anthraquinone from Rhynchotechum vestitum which they called rhynchotechol. Investigations have since been conducted in a search for the active compound, revealing new chemicals (Lu et al., 1998a(Lu et al., , 1998b. ...
January 1998
Phytochemistry
... According to Chen et al. [20] and Lu et al. [21] , for a simple irreversible kinetic resolution, the E-value is shown as follows: ...
May 1995
Tetrahedron Asymmetry
... Compound 3 has been reported from root and leaf extracts of C. glandulosum. [52,54,55] Compound 3 and glycoside derivative, daucosterol (4), were also isolated from the aerial parts of C. glandulosum. [17] The root extracts were reported to contain (24s)-ethylcholesta-5, 22, 25 triene-3β-ol (I). ...
January 1996
Phytochemistry
