[{"from": "human", "value": "Given SMILES, write its number-averaged molecular weight at room temperature and atmospheric pressure. ->  CC1=CC=C(C(N(CC(CCCCCCCCCC)CCCCCCCC)C2=O)=C(C2=C(C(S3)=CC=C3C(S4)=CC(C4=C5C#C[Si](C(C)C)(C(C)C)C(C)C)=C(C#C[Si](C(C)C)(C(C)C)C(C)C)C6=C5C=C(C)S6)N7CC(CCCCCCCC)CCCCCCCCCC)C7=O)S1\n"}, {"from": "gpt", "value": " 76\n"}]