Chalcones (1.24) and dihydrochalocones (1.25) have a linear C3-chain connecting the two rings. The C3-chain of chalcones contains a double bond, whereas the C3-chain of dihydrochalcones is saturated.

(1.24) (1.25)

Chalcones, such as butein (1.26), are yellow pigments in flowers. An example of a dihydrochalcone is phloridzin (phloretin-2'-O-D-glucoside) (1.27), a compound found in apple leaves, and which has been reported to have anti-tumor activity (Nelson and Falk, 1993).


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