07H239-A, a New Cytotoxic Eremophilane Sesquiterpene from the Marine-Derived Xylariaceous Fungus LL-07H239

07H239-A (<b>1</b>), a new eremophilane sesquiterpene from a marine-derived xylariaceous fungus, was isolated, characterized, and shown to be cytotoxic toward a variety of cancer cell lines, with some selectivity for a CCRFCEM leukemia line (IC<sub>50</sub> = 0.9 μg/mL).