2-N-[6-[[4-[6-[[4,6-bis(dibutylamino)-1,3,5-triazin-2-yl]-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]hexyl-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]-6-[butyl-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]-1,3,5-triazin-2-yl]-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]hexyl]-4-N,4-N,6-N,6-N-tetrabutyl-2-N-(1-hydroxy-2,2,6,6-tetramethylpiperidin-4-yl)-1,3,5-triazine-2,4,6-triamine