1H and 13C NMR assignment of benzothiophenquinones from the sulfur‐oxidizing archaebacterium Sulfolobus solfataricus

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Abstract
From Sulfolobus solfataricus, a sulfur‐oxidizing thermophilic member of archaebacteria, three unusual benzothiophenquinones were isolated. Detailed NMR studies on these quinones, including multipulse monodimensional and two‐dimensional techniques, were performed to obtain carbon and proton assignments, onebond, geminal and vicinal coupling constants and T1 relaxation times. This report extends the known quinone composition of thermophilic archaebacteria and further supports the concept that these biomolecules can serve as a useful chemotaxonomic tool.