• Korean Journal of Pharmacognosy
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• v.20 no.4
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• pp.243-253
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• 1989

Anatomical and physico-chemical properties of some nutrient and tonic crude drugs have been estimated and compared. Resin duct and druse crystal were observed more in Acanthopanax Cortex than in Ginseng Radix. Bast fiber bundle and solitary crystals were abandantly present in Glycyrrhizae Radix. Mucilage crude drugs contained mucilage ducts and bundles of raphides as common components and their arrangements of vascular bundles were different. TLC analysis showed different patterns of saponin, flavonoid, ${\gamma}-aminobutyric$ acid and sitosterols.

• Natural Product Sciences
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• v.6 no.3
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• pp.135-138
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• 2000

MeOH extract of Cuscuta chinensis seeds was fractionated with n-hexane, EtOAc and BuOH successively, and antioxidant activities were tested for all fractions using DPPH free radical scavenging method. In the tested fractions, EtOAc fraction showed high antioxidant activity$(EC_{50},\;50\;{\mu}g)$ From the EtOAc fraction, five compounds have been isolated. On the basis of spectral data, these compounds were identified as ${\beta}-sitosterol$, methyl 4-hydroxy-3,5-dimethoxycinnamate, ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$, caffeic acid, quercetin, kaempferol and calycopteretin. Among these compounds, ${\beta}-sitosterol$ and ${\beta}-sitosterol-3-O-{\beta}-D-glucopyranoside$ showed no antioxidant activity. $EC_{50}$ values of methyl 4-hydroxy-3,5-dimethoxycinnamate, caffeic acid, quercetin, kaempferol and calycopteretin were 0.6, 8, 19, 17 and $12\;{\mu}g$, respectively.