Tremasperin, a new O-glucoside C-glucoflavone isolated from Trema aspera is a mixture of mono- and di-acetates. The deacetylated material is shown to be 7-O-β-D-glucosyl-8-C-β-D-glucosyl-4′-O-methylapigenin. The structure has been elucidated from chemical and spectroscopic evidence, with emphasis on the contributions of high resolution mass spectrometry and 1H n.m.r. at 100 Mc./sec.
P. Oelrichs, J. T. B. Marshall and D. H. Williams, J. Chem. Soc. C, 1968, 941 DOI: 10.1039/J39680000941
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