2,2'-Dinor-beta,beta-carotene-3,4,3',4'-tetraone;4,4'-(3,7,12,16-Tetramethyl-1,3,5,7,9,11,13,15,17- octadecanonaene-1,18-diyl)bis(3,5,5-trimethyl-3- cyclopentene-1,2-dione)
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