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Galloylated Flavonol Glycosides from Leaves of Calliandra tergemina with Antibacterial Activities against Methicillin-Resistant Staphylococcus aureus (MRSA)
Three galloylated flavonol glycosides 1 – 3, together with five known flavonol glycosides 4 – 8 were isolated from the active leaves extract of Calliandra tergemina. Their structures and molecular formula were established using spectroscopic analysis and their anti-MRSA (methicillin-resistant Staphylococcus aureus) activities were evaluated by broth microdilution. The isolation of compounds 1 – 8, together with the structural-activity relationship of these flavonol glycosides, based on their anti-MRSA activities, will be presented.