“…Indeed, more than 300 constituents have been identified as bioactive [ 6 , 8 ]. Generally, propolis has been described as a rich source of benzoic acids and derivatives, cinnamic alcohol, cinnamic acid and respective derivatives, sesquiterpenes and triterpene hydrocarbons, benzaldehyde derivatives, alcohols, ketones, and heteroaromatic compounds, terpenes and sesquiterpene alcohols and their derivatives, aliphatic hydrocarbons, minerals, sterols and steroidal hydrocarbons, sugars, and amino acids [ 6 , 8 , 9 ]. Most important, the different combinations of these compounds are responsible for the antibacterial [ 10 , 11 , 12 ], antifungal [ 13 , 14 ], antiviral [ 15 ], anticancer [ 16 , 17 ], anti-inflammatory [ 18 ] and antioxidant [ 19 , 20 , 21 ] activities of propolis.…”