Cyanogenic glycosides from the rare Australian endemic rainforest tree Clerodendrum grayi (Lamiaceae) |
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Authors: | Miller Rebecca E McConville Malcolm J Woodrow Ian E |
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Affiliation: | a School of Botany, The University of Melbourne, Vic., 3010, Australia b Department of Biochemistry and Molecular Biology, The Bio21 Institute of Molecular Sciences and Biotechnology, The University of Melbourne, Vic., 3010, Australia |
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Abstract: | The cyanogenic diglycoside lucumin ((R)-mandelonitrile-β-d-primeveroside) and monoglucoside prunasin ((R)-mandelonitrile-β-d-glucoside) were isolated from the foliage of the rare Australian rainforest tree species Clerodendrum grayi (Lamiaceae). This is the first reported isolation of the diglycoside lucumin from vegetative tissue (foliage), and the first reported co-occurrence of lucumin and prunasin. Furthermore, unusually, the diglycoside lucumin was the most abundant cyanogen accounting for approximately 60% of total cyanide in a leaf tissue. |
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Keywords: | Clerodendrum grayi Lamiaceae, Verbenaceae Cyanogenesis Cyanogenic glycoside Lucumin, prunasin Tropical rainforest Chemotaxonomy |
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