[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an organosiloxane that is pentasiloxane in which all the hydrogens have been replaced by methyl groups. Metabolite observed in cancer metabolism. It has a role as a human metabolite."}, {"from": "gpt", "value": "[C][Si][Branch1][C][C][Branch1][C][C][O][Si][Branch1][C][C][Branch1][C][C][O][Si][Branch1][C][C][Branch1][C][C][O][Si][Branch1][C][C][Branch1][C][C][O][Si][Branch1][C][C][Branch1][C][C][C]"}]