3-Bromo-5-((2-trimethylsilyl)ethynyl)pyridine , its cas register number is 639011-64-6. It also can be called Pyridine,3-bromo-5-[2-(trimethylsilyl)ethynyl]- ; Pyridine,3-bromo-5-[(trimethylsilyl)ethynyl]- (9CI) .