POLY(9,9-DI-(2'-ETHYLHEXYL)FLUORENYL-2,&

POLY(9 9-BIS-(2-ETHYLHEXYL)-9H-FLUORENE&

Poly[9,9-bis(2-ehtylhexyl)fluorenyl-2,7-diyl]

Poly[9,9-di-(2'-ethylhexyl)fluorenyl-2,7-diyl]

Poly[9,9-bis-(2-ethylhexyl)-9H-fluorene-2,7-diyl]