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Investigation of polyphenolic compounds, cytotoxic and antimicrobial activities of Callistemon comboynensis leaves

Hamdy A.Hassan, Amel M.Kamal, Mohamed I.Abdelhady, Munjed Ibrahim

Phytochemical and biological activity of ethanolic extract of Callistemon comboynensis leaves resulted in identification of six known polyphenolic compounds identified as Gallic acid, Ellagic acid, Kaempferol 3-O--Lrhamnopyranoside, Methoxy ellagic acid, Quercetin andKaempferol. The ethanolic extract showed moderate cytotoxic activity against the tested cell line, in addition to significant antibacterial activity against six potential pathogenic bacteria isolated frombottled mineral water.