[{"from": "human", "value": "Provide a description of this molecule. [C][O][Si][Branch1][C][C][Branch1][C][C][O][Si][Branch1][C][C][Branch1][C][C][C].[O][=Si][=O]"}, {"from": "gpt", "value": "The molecule is a silicon based surfactant that decreases the surface tension of gastrointestinal gas bubbles to facilitate their elimination. It has a favourable safety profile as it is not systemically absorbed.  Simethicone has been in use since the 1940s but was granted FDA approval in 1952."}]