Two homologue glycolipids, abruptosides A and B were isolated from the Kenyan soft coral Sinularia abrupta. Their structures are composed of a tetrasubstituted diarabinosyl carbohydrate carrying two acetates, a 3-hydroxybutanoate and a 4Z-dodec-4-en-1-ol or 4Z-tridec-4-en-1-ol group. The structures were determined by MS and 1D and 2D NMR spectroscopy.
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The existence of the 2-hydroxybutyrate brought to fragmentations of 87 mu, e.g. the appearance in the FABMS of a peak at m/z 534 [M-C4H7O2]+.
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