Pyridinium,2-[(1E,3E,5E,7E)-2,6-dimethyl-8-(2,6,6-trimethyl-1-cyclohexen-1-yl)-1,3,5,7-octatetraen-1-yl]-1-(2-hydroxyethyl)-4-[(1E,3E,5E)-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-1,3,5-hexatrien