1H and 13C n.m.r. spectral assignment studies of terretonin, a toxic meroterpenoid metabolite of Aspergillus terreus
Complete assignments of all the resonances in the 1H and 13C n.m.r. spectra of terretonin have been made using a variety of one-dimensional and two-dimensional correlation methods. Nuclear Overhauser enhancements and spin-spin couplings observed in the 1H n.m.r. spectrum indicate that the molecule adopts a conformation in solution similar to that observed in the crystal structure.