(4E,8E,12E,16E)-Ethyl 2-acetyl-5,9,13,17,21-pentamethyl-2-((2E,6E,10E,14E)-3,7,11,15,19-pentamethylicosa-2,6,10,14,18-pentaen-1-yl)docosa-4,8,12,16,20-pentaenoate