Showing structure for 6-hydroxy-3-[(9e,11e,13e,15e)-18-(4-hydroxy-2,6,6-trimethyl-3-oxocyclohex-1-en-1-yl)-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15-octaen-17-yn-1-yl]-2,4,4-trimethylcyclohex-2-en-1-one