[{"from": "human", "value": "What is number-averaged molecular weight of given SMILES at room temperature and atmospheric pressure? ->  CC(S1)=C(CC(CCCCCCCC)CCCCCC)C=C1C(C2=NSN=C23)=CC4=C3C=C(C5=CC(C[C@H](CCCCCC)CCCCCCCC)=C(C6=CC7=C(C(C(CCCCCCCCCCCC)=CC8=C9SC(C)=C8)=C9C(CCCCCCCCCCCC)=C7)S6)S5)C%10=NSN=C%104\n"}, {"from": "gpt", "value": " 67.3\n"}]