New C40-Carotenoid Acyl Glycoside as Principal Carotenoid in Salinibacter ruber, an Extremely Halophilic Eubacterium

Abstract
The principal (>96% of total) carotenoid in the novel, extremely halophilic eubacterium Salinibacter ruber, here called salinixanthin (1), has been assigned the structure (all-E,2‘S)-2‘-hydroxy-1‘-[6-O-(13-methyltetradecanoyl)-β-d-glycopyranosyloxy]-3‘,4‘-didehydro-1‘,2‘-dihydro-β,ψ-caroten-4-one by spectrometric (vis, EIMS, 1HNMR, CD, GCMS) and chemical methods.