[{"from": "human", "value": "Given SMILES, write its weight-averaged molecular weight at normal measurement conditions.. ->  CC1=CC2=C(C3=CC(N(CC)C4=C5C=C6C(C7=CC=C(C8=CC=C(C9=C(OCCCCCC)C(OCCCCCC)=C(C%10=CC=C(C)S%10)C%11=NSN=C%119)S8)C=C7C6(CCCC)CCCC)=C4)=C5C=C3C2(CCCC)CCCC)C=C1\n"}, {"from": "gpt", "value": " 52.9\n"}]