(3S,3'S)-3,3'-Dihydroxy-β,β-carotin-4,4'-dion (3R,3'S,5'R)-3,3'-Dihydroxy-β,K-carotin-6'-on psi,psi-Carotin Ethyl-8'-apo-β-caroten-8'-oat β,β-Carotin-4-on (3R,3'R)-β,β-Carotin-3,3'-diol β,β-Carotin 6,6'-Diapo-.psi.,.psi.-carotindisure Canthaxanthin Torularhodin Methyl-(9-cis)-hydrogen-6,6'-diapo-.psi.,.psi.-carotindioat