New Meroterpenoid and Isocoumarins from the Fungus <i>Talaromyces amestolkiae</i> MST1-15 Collected from Coal Area
Kai-Yu Li,
Qin-Feng Zhu,
Jun-Li Ao,
Fu-Rui Wang,
Xing-Mei Long,
Shang-Gao Liao,
Guo-Bo Xu
Affiliations
Kai-Yu Li
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Qin-Feng Zhu
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Jun-Li Ao
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Fu-Rui Wang
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Xing-Mei Long
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Shang-Gao Liao
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Guo-Bo Xu
State Key Laboratory of Functions and Applications of Medicinal Plants, School of Pharmacy, Guizhou Medical University, Guian New District, Guiyang 550025, China
Three new compounds including a meroterpenoid (1) and two isocoumarins (8 and 9), together with thirteen known compounds (2–7, 10–16) were isolated from the metabolites of Talaromyces amestolkiae MST1-15. Their structures were identified by a combination of spectroscopic analysis. The absolute configuration of compound 1 was elucidated on the basis of experimental and electronic circular dichroism calculation, and compounds 8 and 9 were determined by Mo2(OAc)4-induced circular dichroism experiments. Compounds 7–16 showed weak antibacterial activities against Stenotrophomonas maltophilia with MIC values ranging from 128 to 512 μg/mL (MICs of ceftriaxone sodium and levofloxacin were 128 and 0.25 μg/mL, respectively).
