Wiktionary
chrysin
n. (context organic compound English) The flavone ''5,7-dihydroxy-2-phenyl-4H-chromen-4-one'', isolated from the passionflower (''Passiflora caerulea''), sometimes used as an aromatase inhibitor supplement by bodybuilders and athletes
Wikipedia
Chrysin
Chrysin is a naturally occurring flavone, a type of flavonoid. It is found in the passion flowers Passiflora caerulea and Passiflora incarnata, and in Oroxylum indicum. It is also found in chamomile, in the mushroom Pleurotus ostreatus, and in honeycomb.