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Chemical and antibacterial evaluation of Hypericum triquetrifolium Turra.

Pistelli L, Bertoli A, Morelli I, Menichini F, Musmanno RA, Di Maggio T, Coratza G

Dipartimento di Chimica Bioorganica e Biofarmacia, University of Pisa, Italy. tuipi@farm.unip.it

Five extracts and pure compounds from the aerial parts of Hypericum triquetrifolium were tested for their antibacterial activity against 31 gram-positive and gram-negative strains using the agar dilution method (Lorian). The ethyl acetate extract exhibited a weak antibacterial activity against Staphylococcus strains, and pure constituents such as quercetin and I3,II8-biapigenin were the active components of this extract.

Published 18 October 2005 in Phytother Res, 19(9): 787-91.
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