Abstract:
Penicildiones A−D (
1 −
4 ), four new steroids derivatives together with three known compounds including 16
α-methylpregna-17
α,19-dihydroxy-(9,11)-epoxy-4-ene-3,18-dione-20-acetoxy (
5 ), stachybotrylactone B (
6 ) and stachybotrin (
7 ) were isolated from the soft coral-derived fungus
Penicillium sp. SCSIO41201, cultured in the 1% NaCl PDB substrate. Their structures were determined through spectroscopic methods and
X-ray crystallography. Biological evaluation results revealed that
6 exhibited significant cytotoxic activity against HL-60, K562, MOLT-4, ACHN, 786-O, and OS-RC-2 cell lines with IC
50 values of 5.23, 4.12, 4.31, 23.55, 7.65 and 10.81 μmol·L
−1, respectively, while other compounds showed weak or no cytotoxicity at 50 μmol·L
−1.