Bioactive terpenoids from derived endophytic fungus sp. YD-2.

Two new spiromeroterpenoids, namely fusariumin A (1) and B (2), along with four known terpenoids, asperterpenoid A (3), agathic acid (4), guignardone N (5), and trametenolic acid (6), were obtained from the endophytic fungus sp. YD-2, derived from the twigs of . Their structures were elucidated by a combination of spectroscopic analyses. The absolute configuration of 1 was determined by single-crystal X-ray diffraction using Cu Kα radiation, and that of 2 was elucidated on the basis of experimental and calculated electronic circular dichroism spectra. Compound 2 exhibited moderate anti-inflammatory activity by inhibiting nitric oxide (NO) production in lipopolysaccharide activated RAW264.7 cells with an IC value of 50 μM, and compound 3 showed strong anti-inflammatory activity with an IC value of 1.6 μM. In the antibacterial assay, compound 1 displayed significant activities against and with an MIC value of 6.3 μg mL, and compound 3 showed moderate activities against and with MIC values of 6.3 and 25.2 μg mL, respectively.