[{"from": "human", "value": "What is number-averaged molecular weight of given SMILES at normal measurement conditions.? ->  CC1=CC(CCCCCCCCCCCC)=C(C2=CC=C(C3=CC=C(C4=C(CCCCCCCCCCCC)C=C(C)S4)S3)S2)S1\n"}, {"from": "gpt", "value": " 9.5\n"}]