As a continuation of searching for phytoconstituents that act as promising agents for antimicrobial therapy, rare coumarins were isolated from fruits of and tested. In a first step, the content of major compounds in the aerial parts and fruits of were compared. The results clearly showed that the fruits with dichloromethane as a solvent yielded, in most cases, higher concentrations of almost all the analyzed coumarins than the aerial parts, with peucedanin detected as the most abundant compound with a concentration of 4563.94 ± 3.35 mg/100 g. Under this perspective, the dichloromethane extract from the fruits of was further submitted to high performance countercurrent chromatography with a mixture of -hexane, ethyl acetate, methanol, and water 6:5:6:5 (/). Combination of HPCCC and prep-HPLC yielded 6',7'-dihydroxybergamottin (), officinalin (), stenocarpin isobutyrate (), officinalin isobutyrate (), 8-methoxypeucedanin (), and peucedanin (). Isolated compounds were tested against several Gram-positive and Gram-negative bacteria strains. 6',7'-Dihydroxybergamottin, peucedanin, and officinalin isobutyrate appeared to be the most active against all tested bacteria strains with minimum inhibitory concentration (MIC) values between 1.20 and 4.80 mg/mL. To the best of our knowledge, this is the first report about countercurrent isolation of mentioned coumarins, as well as the first information about their antimicrobial activity.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6100078PMC
http://dx.doi.org/10.3390/molecules23051222DOI Listing

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