Anthraquinone profile, antioxidant and antimicrobial activity of bark extracts of Rhamnus alaternus, R. fallax, R. intermedia and R. pumila

► Rhamnus fallax and R. pumila bark extracts act as strong antioxidants. ► Rhamnus spp. have demonstrated notable antimicrobial activity. ► Antioxidant activity correlates with the amount of polyphenols in bark extracts. ► Chrysophanol and physcion are the most abundant anthraquinones in Rhamnus spp.