[{"from": "human", "value": "Given SMILES, write its PDI at room temperature and atmospheric pressure. ->  CC1=CC=C(N(C2=CC=C(C3=CC(C(C=CC=C4)=C4C(C)=C5)=C5C6=C3C=CC=C6)C=C2)C7=CC=C(CCCCCCCC)C=C7)C=C1\n"}, {"from": "gpt", "value": " 1.5\n"}]