Abstract

The structure of a dimeric dehydration product of the diterpenoid lagochilin — 18-de(hydroxymethyl)-3-O-3′;3-O-18′-dilagohirsin — has been investigated by PMR spectroscopy and x-ray structural analysis. It has ben established that the molecule of this compound has an unsymmetrical dimeric linkage of two fragments of the lagohirsin molecule with the participation of the C3 and C4 carbon atoms of one of them. An analysis of the structure of the “dimer” permitted the hypothesis that the condensation of two lagohirsin molecules took place with the elimination of one molecule of water and one molecule of methyl alcohol.

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