[{"from": "human", "value": "Write weight-averaged molecular weight of given SMILES at normal measurement conditions.. ->  CC1=CC=C(C2=CC=C(C(N(CCCCCCCCCCCCCC)C3=O)=C4C3=C(C5=CC=C(C)O5)N(CCCCCCCCCCCCCC)C4=O)O2)S1\n"}, {"from": "gpt", "value": " 5.2\n"}]