[{"from": "human", "value": "Given SMILES, write its number-averaged molecular weight at normal measurement conditions.. ->  CC1=CC=C(C2=CC3=C(C4=CC(N(CC(CCCCCCCCCC)CCCCCCCC)C5=C6SC(C)=C5)=C6C=C4N3CC(CCCCCCCCCC)CCCCCCCC)S2)C7=NSN=C71\n"}, {"from": "gpt", "value": " 7\n"}]