[{"from": "human", "value": "Write poly dispersity index of given SMILES at room temperature and atmospheric pressure. ->  CC(S1)=CC2=C1C3=C([Si]2(CCCCCCCC)CCCCCCCC)C=C(C([Si]4(CCCCCCCC)CCCCCCCC)=C3)C5=C4C=C(C6=CC=C(C(N(CCCCCCCCCCCC)C7=O)=C8C7=C(C9=CC=C(C)S9)N(CCCCCCCCCCCC)C8=O)S6)S5\n"}, {"from": "gpt", "value": " 2.76\n"}]