Abstract
The biosynthesis of the triterpene 22-(30)-hopene-29-acid and the diterpenes 7,17-sacculatadiene-11,12-dial (sacculatal), trans-phytol and a new neoverrucosane-type diterpenoid (5-oxo-neoverrucos-(13)-ene) was studied by incorporation of [1- 13C]-labelled glucose into axenic cultures of the artic liverwort Fossombronia alaskana. Quantitative 13C NMR spectroscopic analysis of the resulting labelling patterns showed that the isoprene units of the triterpene are derived from the mevalonic acid pathway, whereas the isoprene units of the diterpenes are built up via the methylerythritol phosphate pathway.
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