CAS 873311-51-4 appears in our catalog under these names: Platinum, [1,3-bis[2,6-bis(1-methylethyl)phenyl]-2-imidazolidinylidene][1,3-bis(η2-ethenyl)-1,1,3,3-tetramethyldisiloxane], 98%, [1,3-Bis(2,6-diisopropylphenyl)-imidazolidinylidene][1,3-divinyl-1,1,3,3-tetramethyldisiloxane]platinum(0), 98%, 98%. Offered by: Chemat Brand, Chemat. Available pack sizes: on request, 100mg, 250mg, 1g.