Antibacterial Ellagic Acid Derivatives and Other Constituents from Pancovia pedicellaris

Two new ellagic acid derivatives, named panconosides A (1) and B (2) were isolated from Pancovia pedicellaris together with eleven known compounds (3-13). The structures of 1 and 2, as well as those of the known compounds were established by spectroscopic methods and by comparison with previously reported data. Compounds 1 and 2 were tested in vitro for their antibacterial potential against six strains of microorganisms: Micrococcus luteus. Streptococcus ferus, Streptococcus minor, Escherichia coli, Bacillus subtilis, and Pseudomonas agarici. They were found to exhibit moderate antibacterial activity against all the tested strains compared to standard drugs.