[{"from": "human", "value": "Given SMILES, write its weight-averaged molecular weight at normal measurement conditions.. ->  CC1=CC2=C(C(OCCCCCCCC)=C(C=C(C3=C4C(C=C(C(N(CC(CC)CCCC)C5=O)=O)C5=C4)=C(C)S3)S6)C6=C2OCCCCCCCC)S1\n"}, {"from": "gpt", "value": " 168.0\n"}]