The stereochemistry of reflexin and conocarpin (from Leucospermum spp.) has been elucidated as 4S,5S,8R,9R,10S, whereas that of leucodrin (from Leucadendron spp.) is 4R,5S,8R,9R,10S. This is in accord with a mechanism of biogenesis suggested for these compounds, as well as with the greater reactivity of one lactone ring in the conocarpin series relative to that in the leucodrin series.
G. W. Perold, A. J. Hodgkinson, A. S. Howard and P. E. J. Kruger, J. Chem. Soc., Perkin Trans. 1, 1972, 2457 DOI: 10.1039/P19720002457
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