Paper fluorescent brightener

2-[2-[4-[2-(3-Cyanphenyl)vinyl]phenyl]vinyl]benzonitril Hexanatrium-2,2'-[vinylenbis[(3-sulfonato-4,1-phenylen)imino[6-[bis(2-hydroxyethyl)amino]-1,3,5-triazin-4,2-diyl]imino]]bis(benzol-1,4-disulfonat) 4,4'-Bis(2-methoxystyryl)-1,1'-biphenyl 2,2'-(Naphthalin-1,4-diyl)bis(benzoxazol) 2,2'-(Vinylendi-p-phenylen)bisbenzoxazol Tetranatrium-4,4'-bis[[4-[bis(2-hydroxyethyl)amino]-6-[(3-sulfonatophenyl)amino]-1,3,5-triazin-2-yl]amino]stilben-2,2'-disulfonat Dinatrium-4,4'-bis[[6-anilino-4-[(2-hydroxyethyl)methylamino]-1,3,5-triazin-2-yl]amino]stilben-2,2'-disulfonat