[{"from": "human", "value": "What is poly dispersity index of given SMILES at normal measurement conditions.? ->  CC1=CC([Si]2(CCCCCCCC)CCCCCCCC)=C(S1)C3=C2C(S4)=C(S3)C5=C4C6=C([Si]5(CCCCCCCC)CCCCCCCC)C=C(C7=C8C(C(N(CCCCCCCC)C8=O)=O)=C(C)S7)S6\n"}, {"from": "gpt", "value": " 1.2\n"}]