Ring A-seco limonoids and flavonoids from the Kenyan Vepris uguenensis Engl. and their antioxidant activity

► A comprehensive phytochemical study of Vepris uguenensis was undertaken. ► Two liminoids and a C-7 prenylated flavonoid were isolated. ► Full structural elucidation of the compounds were carried out. ► The C-7 prenylated flavonoid showed good antioxidant activity. ► The isolated limonoids fit neatly into a biosynthetic sequence.