Notofagin is 'n dihidrochalkoon. Dit is 'n C-gekoppelde Phloretien glukosied wat in rooibos (Aspalathus linearis) en Nothofagus fusca (die Nieu-Seeland rooi beuken) gevind word. Dit is 'n fenoliese antioksidant. "Quantitative Characterization of Flavonoid Compounds in Rooibos Tea (Aspalathus Linearis) by LC-UV/DAD". Journal of Agricultural and Food Chemistry. 50 (20): 5513–5519. 2002. doi:10.1021/jf025697h. "The polyphenols of Nothofagus species – II. The heartwood of Nothofagus fusca". Phytochemistry. 6: 59–67. 1967. doi:10.1016/0031-9422(67)85008-8.