[{"from": "human", "value": "What can you tell me about this molecule? [C][Si][Branch1][C][C][Branch1][C][C][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an organosilicon compound that is propionic acid substituted at position 3 by a trimethylsilyl group. It is used as internal reference in the NMR spectrum nuclear magnetic resonance for aqueous solvents (e.g. D2O). It is an organosilicon compound and a monocarboxylic acid. It is functionally related to a propionic acid. It is a conjugate acid of a 3-(trimethylsilyl)propionate."}]