Photoresist Chemicals 2,2′-Bipyridine, 6,6”,6””,6”””-[1,2-ethanediylbis(1-methyl-3,4-diphenylsilacyclopenta-2,4 -diene-1,2,5-triyl)]tetrakis- Cas：819875-18-8 Molecular Formula：C76H58N8Si2