Abstract
The complexation of Li+ to jasplakinolide, a marine sponge derived cyclic depsipeptide showed preferential binding to two out of four carbonyl oxygens (C-10, C-14) and the electrons of the aromatic system of the beta-tyrosine amino acid residue. This is in contrast to previous results obtained by others who proposed complexation to three out of four available carbonyl oxygens (C-1, C-10, C-14). The structure of the complex in CD3CN was determined by NOE restrained molecular dynamic calculations. Structures of the uncomplexed jasplakinolide were calculated in CDCl3 and CD3CN for comparison.
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