Sequoia sempervirens contains a new norlignan with a novel skeleton; the constitution is demonstrated by X-ray analysis of its methyl ether (2) using direct methods, and the absolute configuration deduced from chiroptical data.
M. J. Begley, R. V. Davies, P. Henley-Smith and D. A. Whiting, J. Chem. Soc., Chem. Commun., 1973, 649 DOI: 10.1039/C39730000649
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