[{"from": "human", "value": "Given SMILES, write its PDI at room temperature and atmospheric pressure. ->  CC(O1)=CC2=C1C(C3=CC=C(CCCCCC)S3)=C(C=C(C4=C(CC(CC)CCCC)C=C(C5=CC=C(C6=CC(CC(CCCC)CC)=C(C)S6)C7=NSN=C75)S4)O8)C8=C2C9=CC=C(CCCCCC)S9\n"}, {"from": "gpt", "value": " 2.9\n"}]