Composition in Phenolic Compounds of Elderflower from Albania. Investigation of Antimicrobial Activity

Dried samples of elder flower were analysed HPLC-DADMS/MS to find out the major phenolic compounds. Five hydroxycinnamates (3-O-caffeoylquinic acid, 5-Ocaffeoylquinic acid, 1-/5-O-p-coumaroylquinic acid, 1/5,3di-O-caffeoylquinic acid, x,4-di-Ocaffeoylquinic acid) and six flavonol glycosides (quercetin-3-Orhamnosylglucoside, quercetin-3-O-glucoside, rhamnetin/isorhamnetin-3-O-hexoside, rhamnetin/isorhamnetin-3-O-rhamnosylglucoside, rhamnetin/isorhamnetin-3-O-acetylhexoside and naringenin) were identified. Two more flavonoid were tentativly identified as quercetine-O-dihexoside and naringenin chalcone. Antimicrobial activity of methanolic and aqueous methanolic extracts of S.nigra were tested against: Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 6538, Pseudomonas spp, Candida albicans ATCC 10231, Listeria monocytogenes ATCC 19111 and Salmonella typhimurium ATCC 14028. Elder flower extracts (1 mg/mL) failed to inhibit the growth of microorganisms tested.