28081-83-6 2-Cyclopenten-1-one,3,3'-(3,7,12,16-tetramethyl-1,3,5,7,9,11,13,15,17-octadecanonaene-1,18-diyl)bis[5-hydroxy-2,4,4-trimethyl- 28081-91-6 2,2-[(1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-Tetramethyl-1,3,5,7,9,11,13,15,17-octadecanonene-1,18-diyl]bis(3,4-dihydro-1,3,3-trimethylphenazine)