[{"from": "human", "value": "Write number-averaged molecular weight of given SMILES at room temperature and atmospheric pressure. ->  O=C(CCCCCCC)C1=C(F)C2=C(C)SC(C3=CC4=C(OCC(CCCC)CC)C(SC(C)=C5)=C5C(OCC(CCCC)CC)=C4S3)=C2S1\n"}, {"from": "gpt", "value": " -\n"}]