From the methanolic extract of Crocus sativus petals nine known flavonoids have been isolated and identified, including glycosidic derivatives of quercetin and kaempferol as major compounds (1–2), and their methoxylated and acetylated derivatives. Additionally, LC-ESI-MS qualitative and LC-ESI-MS/MS quantitative studies of the major compounds of the methanolic extract were performed. The high content of glycosylated flavonoids could give value to C. sativus petals, which are a waste product in the production of the spice saffron.
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Montoro et al. (2008) studied this question.
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