Hesperidin chalcone

Hesperidin chalcone (= Chalcone 2, 4, 6, 3-tetrahydroxy-4-methoxy 4 -0-Rut) (chalcone 0-glycoside)... 

Chalcones always contain a hydroxyl group at C-2, which comes from the pyrane ring C of flavanones, which produce chalcones in alkaline medium (Figure 9.18). Under acidic conditions, especially with heating, the opposite reaction proceeds conversion of chalcones into flavanones. For example, naiingenin chalcone gives rise to naringenin hesperidin arises from hesperidin chalcone and isobutrin from butrin. These reactions are related to the... 

One of the earliest methods to measure the bitter naringin and other flavanones in grapefruit juice was developed by W. B. Davis in 1947 (12). This test is based on the reaction of dilute alkali with flavanones to form the corresponding yellow chalcones. The flavanone concentration is then determined by measuring the absorbance of the chalcones at 427 nm. Davis pointed out that the procedure was not specific for any flavanone but could be used to determine the principle flavanones in citrus juice, i.e., naringin in grapefruit juice and hesperidin in orange juice. 

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