CAS 2042521-91-3 appears in our catalog under these names: Poly(9,9-di(2-ethylhexyl)-fluorenyl-2,7-diyl) end capped with N,N-bis(4-methylphenyl)aniline, IDT-2BR . Offered by: Lumtec, Thermo Scientific (Alfa Aesar). Available pack sizes: On request, 100mg, 250mg, 500mg.