Xanthohumol is a yellow leaf pigment, present in all hop varieties. It is a chalkone and isomerizes into a flavanone on alkaline treatment. Xanthohumol has the molecular formula C 21 H 22 O 3 contains three active hydrogen atoms, one methoxylgroup, one carbonylgroup and two double bonds. Alkaline hydrolysis of xanthohumol yields p. oxybenzaldehyde, acetic acid and methoxy‐isoprenylphloroglucinol. Xanthohumol is represented by structure IV.
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Verzele et al. (1957) studied this question.
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