*2.6. Bycyclic*

2.6.1. Asperpentenone

Recently, J. Wang et al. isolated a novel polyketide, asperpentenone A, from the fungus *Aspergillus* sp. [116]. Its structure, elucidated by nuclear magnetic resonance techniques and X-ray diffraction, contains a cyclopentenone-tetrahydrofuran moiety (Figure 26). So far, no biological activity of asperpentenone A has been described.

**Figure 26.** Structure of asperpentenone A.
