Methyl Glucosyl-3,4-dehydro-apo-8′-lycopenoate, a Novel Antioxidative Glyco-C30-carotenoic Acid Produced by a Marine Bacterium Planococcus maritimus

Planococcus maritimus strain iso-3 was isolated from an intertidal sediment sample from the Clyde estuary in the UK. A novel red pigment glyco-carotenoic acid ester, methyl glucosyl-3,4-dehydro-apo-8 '-lycopenoate has been isolated from this marine bacterium using chromatographic methods. The structure of methyl glucosyl-3,4-dehydro-apo-8 '-lycopenoate was determined to be methyl 1-(beta-D-glucopyranosyloxy)-3,4-didehydro-1,2-dihydro-8 '-apo-psi-caroten-8 '-oate by the degradation experiment and the spectroscopic analyses. The methyl glucosyl-3,4-dehydro-apo-8 '-lycopenoate showed potent antioxidative activity in the O-1(2) suppression model.