| Affiliation: | 1. School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 110016 Shenyang, China State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 100850 Beijing, China;2. State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 100850 Beijing, China;3. School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, 110016 Shenyang, China |
| Abstract: | A new polyaromatic metabolite, ent-herqueidiketal ( 1 ), and a new phenalenone derivative, epi-peniciherqueinone ( 2 ), along with twelve known compounds 3 – 14 , were isolated from the fungus Penicillium herquei YNJ-35, a symbiotic fungus of Pulveroboletus brunneopunctatus collected from Nangunhe Nature Reserve, Yunnan Province, China. The structures of 1 – 14 and the absolute configurations of 1 and 2 were determined by their spectroscopic data or by their single-crystal X-ray diffraction analysis or optical rotation values. Compound 1 showed strong antibacterial activity against Staphylococcus aureus (ATCC 29213) with minimum inhibitory concentration (MIC) of 8 μg/mL. In the cytotoxicity assays, compound 1 showed weak inhibitory activity against breast cancer MCF-7 and mice microglial BV2 cells with half maximal inhibitory concentration (IC50) of 17.58 and 29.56 μM; compound 14 showed stronger cytotoxicity against BV2 and MCF-7 cells with IC50 values of 6.57 and 10.26 μM. |
