Spiraeoside
Encyclopedia
Spiraeoside is a chemical compound. It can be isolated from flowers of Filipendula ulmaria (L.) (aka Spiraea ulmaria or meadowsweet) or from the garden onion (Allium cepa).

Spiraeoside is the 4'-O-glucoside
Glucoside
A glucoside is a glycoside that is derived from glucose. Glucosides are common in plants, but rare in animals. Glucose is produced when a glucoside is hydrolysed by purely chemical means, or decomposed by fermentation or enzymes....

 of quercetin
Quercetin
Quercetin , a flavonol, is a plant-derived flavonoid found in fruits, vegetables, leaves and grains. It also may be used as an ingredient in supplements, beverages or foods.-Occurrence:...

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