Tectoridin is an isoflavone, a type of flavonoid. It is the 7-glucoside of tectorigenin and can be isolated from flowers of Pueraria thunbergiana (Leguminosae). Tectoridin is an isoflavone, a type of flavonoid. It is the 7-glucoside of tectorigenin and can be isolated from flowers of Pueraria thunbergiana (Leguminosae).