Allium Cepae Extract

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China

Allium Cepae Extract
Total polyphenol and main flavonoid antioxidants in different onion (Allium cepa L.) varieties.
In onion, spiraeoside (quercetin-42-O-²-D-glucoside), rutin and quercetin and 3 other not identified compounds were found as the major constituents. Significant cultivar differences were found. The most abundant compound was spiraeoside (32 234 mg/kg DM in red onion, 23 283 mg/kg DM in yellow onion and 265 mg/kg DM in white onion).
During storage, an increase in flavonoids could be observed, especially at a laboratory temperature compared to storage at a lower temperature.
Spiraeoside,Synonym(s): Quercetin 4'-glucoside. Spiraein. Spiraeoside. SpireosideChapman Hall Number: KWD91-SCAS Registry Number: 20229-56-5Type of Compound Code(s): VK5250Molecular Formula: C21H20O12Molecular Weight: 464.382Accurate Mass: 464.09548Percentage Composition: C 54.32%; H 4.34%; O 41.34%Biological Source: Isol. from Spiraea ulmaria and other plant spp.Physical Description: Yellow needles (MeOH aq.)Melting Point: Mp 240-241 (209-210).
We use the red onion for extraction, which contains the highest spiraeoside.

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