Showing structure for 2,6,6-trimethyl-1-[(3e,5e,7e,9e,11e,13e,15e)-3,7,12,16-tetramethyl-18-(2,6,6-trimethylcyclohexa-1,3-dien-1-yl)octadeca-3,5,7,9,11,13,15-heptaen-1,17-diyn-1-yl]cyclohexa-1,3-diene