A SAPONIN CONJUGATED WITH 2,3-DIHYDRO-2,5-DIHYDROXY-6-METHYL-4H-PYRAN-4-ONE FROM DOLICHOS-LABLAB

被引：25
|
作者：
YOSHIKI, Y
KIM, JH
OKUBO, K
NAGOYA, I
SAKABE, T
TAMURA, N
机构：
[1] TOHOKU UNIV,FAC AGR,DEPT APPL BIOL CHEM,AOBA KU,SENDAI,MIYAGI 981,JAPAN
[2] GYEONGSANG NATL UNIV,COLL AGR,CHINJU 660701,SOUTH KOREA
[3] ASAHI CHEM IND CO LTD,ANALYT RES CTR,FUJI 416,SHIZUOKA,JAPAN
来源：
PHYTOCHEMISTRY | 1995年 / 38卷 / 01期
关键词：
DOLICHOS LABLAB; LEGUMINOSAE; HYACINTH BEAN; DDMP-SAPONIN; TRITERPENOIDS; SOD-LIKE ACTIVITY;
D O I：
10.1016/0031-9422(94)00571-A
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A new 2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one (DDMP)-conjugated saponin, lablab saponin I, was isolated from the hypocotyl of hyacinth bean (Dolichos lablab). The structure was elucidated by H-1 NMR and C-13 NMR spectroscopy and chemical techniques as 3-O-[alpha-L-rhamnopyranosyl-(1 --> 2)-beta-D-galactopyranosyl(1 --> 2)-beta-D-glucuronopyranosyl(1 -->)]-22-O-[2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one(2' -->)]-3 beta,22 beta,24-trihydroxyolean-12-en-28-al. SOD (superoxide dismutase)-like activity depended upon the DDMP group and the aldehyde group (C-28) of the aglycone was observed in the order of lablab saponin I > glutathione > soyasaponin beta g > maltol. The soybean saponin Bb, lacking the DDMP moiety was found not to exhibit the SOD-like activity.
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页码：229 / 231
页数：3
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