[{"from": "human", "value": "Write weight-averaged molecular weight of given SMILES at room temperature and atmospheric pressure. ->  CC1=C2C(C(N1CC(CCCCCCCCCC)CCCCCCCC)=O)=C(C3=CC=C(C4=C(CCCCCC)C=C(C5=C(C(N(CCCCCCCC)C6=O)=O)C6=C(C7=CC(CCCCCC)=C(C8=CC=C(C)S8)S7)S5)S4)S3)N(CC(CCCCCCCC)CCCCCCCCCC)C2=O\n"}, {"from": "gpt", "value": " 62.7\n"}]