CAS 2304444-48-0 appears in our catalog under these names: Poly((9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p -xylene)), Y5 , Y5, >=99%. Offered by: Lumtec, Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: On request, 100mg, 250mg, 500mg.