Abstract
Eighteen polycyclic polyprenylated acylphloroglucinols were isolated from the whole plant of Hypericum scabrum Linn., including six new compounds (1–6). Their structures were elucidated by comprehensive spectroscopic analyses. The evaluation of their cytotoxic activities was carried out against SMMC-7721 and MGC-803 cell lines. We found that most tested compounds exhibited moderate cytotoxic activities against SMMC-7721 cell line except for 11 and 12, while compounds 1, 5–7, 13 and 16 also showed cytotoxic activities on MGC-803 cells. Besides, Bacillus subtilis, MRSA and MDPRA were also used to test inhibitory activity of these compounds. Our results showed that only compounds 12 and 13 presented weak inhibitory activity against Bacillus subtilis, while compounds 7, 13 and 14 also inhibited MRSA weakly.
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