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Phytosterolins from phytolacca esculenta
Woo, Won-Sick,Kang, Sam-Sik The Pharmaceutical Society of Korea 1973 약학회지 Vol.17 No.3
A glucoside mixture of ${\alpha}$-spinasterol and ${\delta}^7$-stigmastenol was isoated from the roots of Phytolacca esculenta $_{VAN}$ H$_{OUTTE}4. This the first reported occurrence of these glucosides in Phytolaccaceae family.
Isolation of Toxic Saponins from the Roots of Patrinia scabiosaefolia
Won Sick Woo,Jae Sue Choi,Kuk Hyun Shin 한국생약학회 1985 생약학회지 Vol.16 No.4
During the biological screening of Chinese drugs, it was found that alcoholic extract of the roots of Patrinia scabiosaefolia (Valerianaceae) caused a significant prolongation of hexobarbital-induced sleeping time and elevation of serum transaminase activities accompanied by severe histopathological changes in the hepatic tissues in mice on three day pretreatments. The systematic fractionation of the methanol extract monitoring by bioassay led to isolation of toxic saponins such as 3-O-α-L-arabinopyranosyl hederagenin 28-O-β-D-glucopyranosyl (1→6)-D-glucopyranoside and its 2`-acetate and 3-O-β-D-glucopyranosyl (1→3)-α-L-rhamnopyranosyl (1→2)-α-L-arabinopyranosyl oleanolic acid and its 28-O-β-D-glucopyranosyl (1→6)-β-D-glucopyranoside.
The Structure of Phytolaccoside G
Woo, Won-Sick,Kang, Sam-Sik The Pharmaceutical Society of Korea 1977 약학회지 Vol.21 No.3
The structure of phytolaccoside G(I), one of the minor saponins of the roots of Phytolacca americana, has been elucidated as 3-${\beta}$-D-xylopyranosyljaligonic acid. And phytolaccoside B(II) is 30-methylester of phytolaccoside G.
Nature of the Hydrogen Chloride Induced Isomers of $\alpha$-Spinasterol
Woo, Won-Sick,Kang, Sam-Sik The Pharmaceutical Society of Korea 1974 약학회지 Vol.18 No.3
It was established that .alpha.-spinasterol (I) was isomerized by hydrogen chloride to a mixture of two isomers. These isomers were separated into each of components and identified as .DLETA.$^{8(14),22}$ -stigmastadienol (III) and ${\delta}$$^{14,22}$ -stigmastadienol (IV), respectively. The mass spectra of these compounds were found to be particularly suitable to idetify the position of nuclear double bond of sterols possessing 22 : 23 -double bond in side chain.
The Chiroptical Properties and Absolute Configuration of 28-nor-$\beta$-amyrins
Woo, Won-Sick The Pharmaceutical Society of Korea 1991 Archives of Pharmacal Research Vol.14 No.2
The existence in nature of two isomers of 28-nortriterpenes is known. One is normal D/E cis form and the other is $17\alpha$-hydrogen D/E trans form. Since the latter cannot exist with ring D in the chair conformation, the chiroptical method is not applicable to determination of the absolute configuration. The stereochemical assignment would now be made by NMR data. Confirmation of this view could be provided by the synthesis of $3\beta, 21\beta-{dihydroxy-16-keto-28-nor-17}\alpha, \;18\beta-{olean-12-ene}$ as a model compound.
Sterols and terpenoids from phytolacca esculenta
Woo, Won-Sick,Kang, Sam-Sik The Pharmaceutical Society of Korea 1973 약학회지 Vol.17 No.3
Phytolaccagenin, as a minor free terpenoid, was isolated from the roots of phytolacca esculenta van Houtte. A mixture of sterols was also isolated and identified as ${\alpha}$-spinasterol and ${\delta}^7$-stigmastenol, which never seemed to have been found in phytolaccaceae.
Phytochemical Survey of Saudi Arabian Plants
Won Sick Woo,Hyung Joon Chi,Ahmad Jado 한국생약학회 1976 생약학회지 Vol.7 No.4
Phytochemical survey has been made of the occurrence of alkaloids, saponins, terpenoids and flavonoids in 43 Saudi Arabian plants. The result is presented in Table I.
Furoquinoline Alkaloids in Dictamus albus Root Bark
Won Sick Woo,Sam Sik Kang 한국생약학회 1985 생약학회지 Vol.16 No.3
From the root bark of Dictamnus albus (Rutaceae) five furoquinoline alkaloids, robustine, dictamine, γ-fagarine, skimmianine and haplopine were isolated and characterized by spectral data.