Carotenoids of tunicates. III. The structural elucidation of two new marine carotenoids, amarouciaxanthin A and B.
The structure of two new marine carotenoids, isolated from the tunicate, Amaroucium pliciferum, and designated as amarouciaxanthin A and B, were determined on the basis of chemical and spectral data. Amarouciaxanthin A was determined as (6S, 3'S, 5'R,6'R)- 6,3',5'-trihydroxy-4,5,6',7'-tetradehydro-7,8,5',6'-tetrahydro-beta, beta-carotene-3,8-dione, and Amarouciaxanthin B was determined as (6S,3'R)-6,3'-dihydroxy-4,5,7',8'-tetradehydro-7,8-dihydro-beta,beta- carotene-3,8-dione. These two compounds are also presumed to be new metabolic products of a typical marine carotenoid, fucoxanthin.
D000818:Animals; D000970:Antineoplastic Agents / Q000302:isolation & purification; D002338:Carotenoids / Q000302:isolation & purification* / Q000494:pharmacology; D002942:Circular Dichroism; D007942:Leukemia, Experimental / Q000188:drug therapy; D051379:Mice; D013056:Spectrophotometry, Ultraviolet; D014561:Urochordata / Q000032:analysis*; D024341:Xanthophylls
D000970:Antineoplastic Agents; D024341:Xanthophylls; C046849:amarouciaxanthin A; D002338:Carotenoids; C046850:amarouciaxanthin B