Abstract
A glucoside of p-hydroxymandelonitrile has been isolated from Taxus canadensis, T. media. var hicksii and T. cuspidata var. nana and shown to be identical with phyllanthin. Since the name phyllanthin has been used for more than one compound the alternative name taxiphyllin is proposed. Proton magnetic resonance (PMR) spectral studies of fully acetylated taxiphyllin, dhurrin and prunasin indicated that taxiphyllin is β-D-glucopyranosyloxy-D-p-hydroxymandelonitrile and that dhurrin is β-D-glucopyranosyloxy-L-p-hydroxymandelonitrile. These conclusions are supported by conformational analysis and specific rotation data.
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