The compound Drosophilin A is known to have antibacterial and antifungal activity (Anchel et al. 1955; Anchel 1952; Kavanagh et al. 1952). Its methylated analog, Drosophilin A methyl ether, also a fungal metabolite (Teunissen 1999), has no reported -as far as i know- any biological activity.
Chemical structures from NIST Chemistry WebBook, SRD 69