LIQUIDAMBIN, AN ELLAGITANNIN FROM LIQUIDAMBAR FORMOSANA

Article abstract of DOI:10.1016/S0031-9422(00)81757-4

Key Word Index - Liquidambar formosana; Hamamelidaceae; tannin; hydrolysable tannin; ellagitannin; liquidambin; equilibration; biogenesis; casuarinin; pedunculagin. A new ellagitannin, named liquidambin, which could be biogenetically closely correlated with casuarinin and pedunculagin, has been isolated from the leaves of Liquidambar formosana.Its structure was determined as 5-O-galloyl-2,3,4,6-di-O-(S)-hexahydroxydiphenoyl-D-glucose.The structural equilibration due to hydration of the aldehyde group of the glucose core in this tannin was shown from its (1)H and (13)C NMR spectra.