[{"from": "human", "value": "Write weight-averaged molecular weight of given SMILES at normal measurement conditions.. ->  CC(S1)=CC2=C1C(CC(CCCC)CCCCCC)=C(C=C(C3=CC4=C(C=C(C5=C(F)C(F)=C(C6=CC7=C(C=C(C)S7)S6)C8=C5N=C(C9=CC=C(OCCCCCCCC)C=C9)C(C%10=CC=C(OCCCCCCCC)C=C%10)=N8)S4)S3)S%11)C%11=C2CC(CCCCCC)CCCC\n"}, {"from": "gpt", "value": " 42.0\n"}]