[{"from": "human", "value": "Given SMILES, write its weight-averaged molecular weight at room temperature and atmospheric pressure. ->  CC1=C2C(C(N(C(CCCCCCCC)CCCCCCCC)C2=O)=O)=C(C3=C(CCCCCCCCCCCC)C=C(C4=CC=C(C5=CC(CCCCCCCCCCCC)=C(C)S5)[Se]4)S3)[Se]1\n"}, {"from": "gpt", "value": " 85.0\n"}]