Assertion: dinoflagellate's structure | /r/HasProperty | determined by nmr spectroscopic analysis
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Source sentences:
text: A pair of previously unknown sterols, stigmasta-5,24,28-trienol and stigmasta-24,28-dienol, were detected in D. brightwellii and their structures were determined by NMR spectroscopic analysis and by synthesis of the former sterol from saringosterol.