Pyridine, 4,4'-[(2,3,5,6-tetramethyl-1,4-phenylene)di-2,1-ethynediyl]bis-

Pyridine, 4,4'-[(2,3,5,6-tetramethyl-1,4-phenylene)di-2,1-ethynediyl]bis- · CAS 918801-05-5