[{"from": "human", "value": "What is weight-averaged molecular weight of given SMILES at room temperature and atmospheric pressure? ->  O=C(C1=C2SC(C3=CC(C(N(C[C@H](CCCCCCCCCC)CCCCCCCC)C4=C5SC(C6=CC7=C(C(OC[C@@H](CC)CCCC)=C(C=C(C)S8)C8=C7OC[C@@H](CCCC)CC)S6)=C4)=O)=C5S3)=C1)N(C[C@@H](CCCCCCCCCC)CCCCCCCC)C9=C2SC(C)=C9\n"}, {"from": "gpt", "value": " 49\n"}]