1,3,5-Triazine-2,4,6-triamine,N,N'''-1,2-ethanediylbis[N-[3-[[4,6-bis[(3-methoxypropyl)(2,2,6,6-tetramethyl-4-piperidinyl)amino]-1,3,5-triazin-2-yl]amino]propyl]-N',N''-bis(3-methoxypropyl)-N',N''-bis(2,2,6,6-tetramethyl-4-piperidinyl)-