The biosynthesis of phenols. Part XXIV. Arugosin C, a metabolite of a mutant strain of Aspergillus rugulosus
It has been established that arugosin C, C25H28O6, an optically active metabolite of A. rugulosus, has the dibenz-[b,e]oxepin structure (IV) and is, therefore, closely related to arugosin A. This structure was established by mass spectrometry and by a comparison of the 1H and 13C n.m.r. spectra with those of arugosin A.