CAS 900169-53-1 appears in our catalog under these names: Dichloro(1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)-(benzylidene)bis(3-bromopyridine)ruthenium(II), Grubbs 3rd 98%, GRUBBS CATALYST® M300 CHEMBEADS, GRUBBS CATALYST® M300, Grubbs Catalyst, 3nd Generation, 98%, 98%. Offered by: Biosynth, Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 2g, 5g, 100mg, 250mg, 1g, 500MG, 10g.