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Isolation and NMR Assignment of a Pennogenin Glycoside from Dioscorea bulbifera L. var sativa
Remy Bertrand Teponno,Azefack Leon Tapondjou,Jules Desire Djoukeng,Eliane Abou-Mansour,Raphael Tabacci,Pierre Tane,David Lontsi,Hee-Juhn Park 한국생약학회 2006 Natural Product Sciences Vol.12 No.1
steroidal saponin, 3-O-α-L-rhamnopyranosyl-(1. 2)-[α-L-rhamnopyranosyl-(1. 3)]-β-D-glucop-yranosylpennogenin (1, spiroconazole A) was isolated from the tubers of Dioscorea bulbifera L. var sativa and1H-and 13C-NMR assignment was completed using HMBC corelation. In addition, four phenolic substances, 2,7-dihydroxy-4-methoxyphenanthrene (2), quercetin (3), quercetin-3-O-β-D-glucopyranoside (4), and quercetin-3-O-β-D-galactopyranoside (5) were also isolated. KeywordsDioscorea bulbifera L. var sativa, steroidal saponin, phenanthrene, flavonoid, HMBC
Leon Azefack Tapondjou,Kemvoufo Beaudelaire Ponou,Remy Bertrand Teponno,Marius Mbiantcha,Jules Desire Djoukeng,Telesphore Benoit Nguelefack,Pierre Watcho,Aurelio Gomez Cadenas,박희준 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.5
A new steroidal saponin, mannioside A (1), was isolated from the stem bark of Dracaena mannii, together with the known pennogenin (2), pennogenin-3-O-β-D-glucopyranoside (3) and pennogenin-3-O-α-L-rhamnopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→3)]-β-D-glucopyranoside (4). Their structures were determined using 1D- and 2D-NMR spectroscopy and mass spectrometry. Compounds 1 and 3 significantly inhibited carrageenan-induced paw edema in the rat; compound 4 was moderately active whereas 2 showed very weak activity.
Tapondjou, Leon Azefack,Ponou, Kemvoufo Beaudelaire,Teponno, Remy Bertrand,Mbiantcha, Marius,Djoukeng, Jules Desire,Nguelefack, Telesphore Benoit,Watcho, Pierre,Cadenas, Aurelio Gomez,Park, Hee-Juhn 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.5
A new steroidal saponin, mannioside A (1), was isolated from the stem bark of Dracaena mannii, together with the known pennogenin (2), pennogenin-3-O-$\beta$-D-glucopyranoside (3) and pennogenin-3-O-$\alpha$-L-rhamnopyranosyl-($1{\rightarrow}2$)-[$\alpha$-L-rhamnopyranosyl-($1{\rightarrow}3$)]-$\beta$-D-glucopyranoside (4). Their structures were determined using 1D- and 2D-NMR spectroscopy and mass spectrometry. Compounds 1 and 3 significantly inhibited carrageenan-induced paw edema in the rat; compound 4 was moderately active whereas 2 showed very weak activity.