Lambertianin D is an ellagitannin found in ''
Rubus lambertianus
''Rubus lambertianus'' is a flowering plant species in the genus ''Rubus'' found in Southern China (including Hainan), Taiwan, Japan, and Thailand. Its ploidy is 2''n'' = 4X (tetraploid). The ellagitannins lambertianin A, B, C and D can be f ...
''.
It is
tetramer
A tetramer () ('' tetra-'', "four" + '' -mer'', "parts") is an oligomer formed from four monomers or subunits. The associated property is called ''tetramery''. An example from inorganic chemistry is titanium methoxide with the empirical formula ...
of
casuarictin
Casuarictin is an ellagitannin, a type of hydrolysable tannin. It can be found in ''Casuarina'' and ''Stachyurus'' species.Tannins of Casuarina and Stachyurus species. I: Structures of pendunculagin, casuarictin, strictinin, casuarinin, casuariin, ...
linked by
sanguisorbic acid
Sanguisorbic acid is a constituent of some ellagitannins. It is constituted by a hexahydroxydiphenic acid unit linked by an O-C bond to a gallic acid. The differences with its isomers, valoneic acid and nonahydroxytriphenic acid, are that the hydr ...
ester groups between glucopyranose moieties.
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References
Ellagitannins
Natural phenol tetramers
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