“…It was reported that flavonoids were more abundant than phenolic acid including rutin (48), quercetin (26), genistein (70), kaempferol (25), chrysin (2), pinocembrin (3) and galangin (9). [110] Northern African Coast Egyptian propolis analyzed by GC/MS was a typical poplar propolis type as reported by [111] but with few differences such as the presence of di-and triterpenes but at very low concentrations. Samples from Upper and East Nile Delta in Egypt were mainly characterized by the presence aliphatic acids (lactic acid, succinic acid, stearic acid, oleic acid, palmitic acid), phenolic acids [benzoic (28), ferulic (7), caffeic (5), 3,4-dime-thoxycinnamic (29), cinnamic (21) and p-coumaric acids (6)] ( Figure 2), flavonoids [pinocembrin chalcone (71), pinocembrin (3) pinobankasin-3-acetate (4)] (Figure 1) and di-and triterpene, in lower amounts, were also detected (e. g., cycloartenol (72), α-amyrin (73), triterpenes of β-amyrin type (74)] (Figure 4).…”