Two diterpenes with new carbocyclic ring systems from an Australian collection of the brown alga Dictyota dichotoma

Australian Journal of Chemistry
1982.0

Abstract

<jats:p>The dichloromethane extract of the brown alga Dictyota dichotoma has yielded a number of known diterpenes together with representatives of two previously unreported carbocyclic diterpene classes. The structure and absolute stereochemistry of the bicyclo[3,3,1]nonane derivative (6) was solved by single-crystal X-ray analysis of a heavy-atom derivative and the gross structure of the dialdehyde (8) was inferred from spectral evidence.

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