Carotenoid pigments of Sorangium compositum (Myxobacterales) including two new carotenoid glucoside esters and two new carotenoid rhamnosides.

Abstract

The carotenoid pigments of the myxobacterium Sorangium compositum were analyzed by chromatographical and chemical techniques and by visible, infra red, and mass spectroscopy. Besides γ-carotene, neurosporene, torulene, lycopene, and 1′,2′-dihydro-1′-hydroxy-γ-carotene, four new carotenoid glycosides were found. These pigments were identified as 1′,2′-dihydro-1′-hydroxy-torulene glucoside ester (I), 1′,2′-dihydro-3,1′-dihydroxy-torulene glucoside ester (III), 1′,2′-dihydro-1′-hydroxy-torulene rhamnoside (II), and 1′,2′-dihydro-3,1′-dihydroxytorulene rhamnoside (IV).