Chevalones H-M: Six New α-Pyrone Meroterpenoids from the Gorgonian Coral-Derived Fungus Aspergillus hiratsukae SCSIO 7S2001.

Six new α-pyrone meroterpenoid chevalones H-M ( 1 - 6 ), together with six known compounds ( 7 - 12 ), were isolated from the gorgonian coral-derived fungus Aspergillus hiratsukae SCSIO 7S2001 collected from Mischief Reef in the South China Sea. Their structures, including absolute configurations, were elucidated on the basis of spectroscopic analysis and X-ray diffraction data. Compounds 1 - 5 and 7 showed different degrees of antibacterial activity with MIC values of 6.25-100 μg/mL. Compound 8 exhibited potent cytotoxicity against SF-268, MCF-7, and A549 cell lines with IC ₅₀ values of 12.75, 9.29, and 20.11 μM, respectively.