O _____ HO / \ / \ __/ \ | | | \_____/ | | | \ / \ / HO C ║ O _Apigenin_, found in parsley and celery, as the glucoside apiin, O _____ HO / \ / \ __/ \OH | | | \_____/ | | | \ / \ / HO C ║ O _Campferol_, found in Java indigo, as the glucoside campferitrin, O _____ HO / \ / \ __/ \OH | | | \_____/ | | |OH \ / \ / HO C ║ O _Fisetin_, found in quebracho wood and fiset wood, O ____OH HO / \ / \ __/ \OH | | | \_____/ | | | \ / \ / C ║ O _Quercitrin_, found in oak bark, horse-chestnut flowers, and in the skin of onions, O ____OH HO / \ / \ __/ \OH | | | \_____/ | | |OH \ / \ / HO C ║ O _Morin_, found in yellow wood (_Morus tinctoria_). O HO____ HO / \ / \ __/ \OH | | | \_____/ | | |OH \ / \ / HO C ║ O _Gentisin_, found in yellow gentian (_Gentiana lutea_), O CH_{3}O / \ / \ / \ | | | | | | | | \ / \ / \ / OH HO C ║ O