Abstract
A chemical investigation of the MeOH extract of a marine sponge Haliclona (Reniera) sp., collected off the coast of Ulleung Island, Korea, led to the isolation of thirteen new cerebrosides (1--3, 5--14), along with a known analogue (4). Their structures were elucidated on the basis of 1D and 2D NMR spectroscopy, MS spectrometry, and chemical method. The major new features of these glucocerebrosides are C15 and C19 acyl chains, long (C24-C28) acyl chains, or the S-configuration of the acyl chains. It is noteworthy that both R- and S-configurations of the acyl chains were observed in the same specimen.
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