[{"from": "human", "value": "Provide a description of this molecule. [C][Si][Branch1][C][C][Branch1][C][C][N][Si][Branch1][C][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is an N-silyl compound obtained from ammonia by replacement of two of the hydrogens with trimethylsilyl groups. Hexamethyldisilazane is a derivatisation agent used in gas chromatography mass spectrometry applications. It has a role as a chromatographic reagent. It derives from a hydride of an ammonia."}]