[{"from": "human", "value": "Given SMILES, write its number-averaged molecular weight at room temperature and atmospheric pressure. ->  CC(S1)=CC2=C1C3=C(C(OCC(CCCCCCCC)CCCCCC)=C(C4=C(C=C(C5=CC=C(C6=C7C(C(N6CC(CCCCCCCC)CCCCCC)=O)=C(C8=CC=C(C)S8)N(CC(CCCCCC)CCCCCCCC)C7=O)S5)S4)S9)C9=C3OCC(CCCCCC)CCCCCCCC)S2\n"}, {"from": "gpt", "value": " 3.65\n"}]