Transcription of FLAVONOIDS - Semmelweis Egyetem
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FLAVONOIDS - Semmelweis Egyetem
FLAVONOIDS . Dr. Kursinszki L szl . Semmelweis University, Department of Pharmacognosy 2015. 1. FLAVONOIDS FLAVONOIDS in the broad sense of the term are virtually universal plant pigments. Almost always water-soluble, they are responsible for the color of flowers, fruits, and sometimes leaves, Examples are yellow FLAVONOIDS (chalcones, aurones, and yellow flavonols) and red, blue, or purple anthocyanins. When they are not directly visible, they contribute to the color by acting as copigments: for example, colorless flavone and flavonol copigments protect anthocyanins.
Flavones, Flavonols They represent the majority of known flavonoids in the strict sense. Ring A substituents •Phenolic hydroxyl groups at C-5 and C-7 , (i n over 90% of cases), free or etherified, or one of them
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