• YAKHAK HOEJI
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• v.38 no.6
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• pp.770-774
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• 1994

The chemical constituents of Kyllinga brevifolia Rottb. var. leiolepsis Hara (Cyperaceae) were studied. From the chloroform and n-butanol soluble fractions, five compounds were isolated by chromatographic purification process. They were identified as ${\beta}-sitostenone$, ergosterol peroxide, ${\beta}-sitosterol$, ${\beta}-sitosteryl$-3-O-{\beta}-D-glucopyanoside and vitexin, respectively. This is the first report of the identification of ${\beta}-sitostenone$, ergosterol peroxide from Cyperaceae.

• Natural Product Sciences
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• v.10 no.6
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• pp.306-309
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• 2004

Triterpenoids were isolated from the whole plant of Orostachys japonicus (Crassulaceae) by repeated column chromatography. Their structures were identified as friedelin (1), glutinol (2), ${\beta}-sitosterol$ (3), friedelinol (4), $5{\alpha},8{\alpha}-peroxyergosterol$ (5), ${\beta}-sitostenone$ (6) and glutinone (7) by spectral analysis. Among them, compounds 5 and 6 were isolated for the first time from this plant.

• Natural Product Sciences
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• v.22 no.4
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• pp.225-230
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• 2016

Phytochemical investigation from the stem bark of Beilschmiedia pulverulenta resulted in the isolation of five lignans, (+)-yangambin (1), (+)-sesartemin (2), (+)-excelsin (3), (+)-sesamin (4), and (+)-syringaresinol (5), together with lupeol (6), lupenone (7), ${\beta}-sitosterol$ (8), and ${\beta}-sitostenone$ (9). Their structures were established by the analysis of their spectroscopic (1D and 2D NMR) and spectrometric (MS) data, as well as by comparison with those reported in the literature. The isolated lignans were tested for their anticholinesterase (AChE: acetylcholine esterase and BChE: butyryl cholineesterase) and anti-inflammatory (COX-2: cyclooxygenase-2 and LOX: lipoxygenase) activities. All the isolated lignans (1 - 5) exhibited significant inhibition activities in AChE/BChE and COX-2/LOX assays with $IC_{50}$ values ranging from $168.8-504.2{\mu}M$ and $21.0-59.4{\mu}M$, respectively.