Biomaterial Database

Chemical constituents from the seeds of Trifolium alexandrinum. 2008

M Sharaf

Department of Phytochemistry and Plant Systematics, National Research Centre, Cairo, Egypt. sharrafali58@hotmail.com

The ethanolic extract of the seeds of Trifolium alexandrinum afforded a new naturally occurring compound identified as methyl-alpha-glucose. The known compounds quercetin, kaempferol, apigenin 7-O-beta-D-glucoside and the nucleoside xanthosine were also isolated. The isolated compounds were identified by spectroscopic (UV, (1)H-, (13)C-NMR, DEPT, HMQC and HMBC) and spectrometric (ESI-MS/MS) analyses. The spectroscopic data of the isolated nucleoside were reported for the first time as a natural isolate.

UI	MeSH Term	Description	Entries
D011794	Quercetin	A flavonol widely distributed in plants. It is an antioxidant, like many other phenolic heterocyclic compounds. Glycosylated forms include RUTIN and quercetrin.	3,3',4',5,7-Pentahydroxyflavone,Dikvertin
D005960	Glucosides	A GLYCOSIDE that is derived from GLUCOSE.	Glucoside
D012263	Ribonucleosides	Nucleosides in which the purine or pyrimidine base is combined with ribose. (Dorland, 28th ed)
D012639	Seeds	The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield.	Diaspores,Elaiosomes,Embryos, Plant,Plant Embryos,Plant Zygotes,Zygotes, Plant,Diaspore,Elaiosome,Embryo, Plant,Plant Embryo,Plant Zygote,Seed,Zygote, Plant
D014970	Xanthines	Purine bases found in body tissues and fluids and in some plants.
D044949	Kaempferols	A group of FLAVONOLS based on kaempferol. They are derived from naringenin and can be hydroxylated to QUERCETIN or reduced to leucopelargonidin.
D047310	Apigenin	5,7,4'-trihydroxy-flavone, one of the FLAVONES.
D029921	Trifolium	A plant genus of the family FABACEAE.	Clover, Red,Red Clover,Trifolium pratense,Trifolium repens,Trifolium pratenses,Trifolium repen,Trifoliums,pratenses, Trifolium,repen, Trifolium