Notizen: Myricetin-5-methyläther in Rhododendron-Blüten

Abstract

In addition to azaleatin and quercitin, myricetin and its previously unknown methyl ether compound were found. Azaleatin or quercitin or both predominate in white flowers, myricetin and its 5-methylether compound are almost completely absent. In blue-violet (anthocyanin colored) flowers myricetin-5-methylether + azaleatin or myricetin + quercitin or all of them are present. Orange and yellow colored flowers (carotinoid-colored) are relatively poor in flavonol and show no definite regularities.