Oleaceran: A Novel Spiro[isobenzofuran-1,2′-naptho[1,8-bc]furan] Isolated from a Terrestrial Streptomyces sp.

Chemical analysis of a terrestrial-derived Streptomyces sp. Lv20–195 cultivated from the root zone of Olea europea yielded oleaceran, 1, possessing a novel spiro[isobenzofuran-1,2′-naptho[1,8-b,c]furan] carbon skeleton. The structure of 1 was determined by detailed spectroscopic analysis.