[{"from": "human", "value": "What is poly dispersity index of given SMILES at normal measurement conditions.? ->  CC1=CC2=C(C(SC(C3=C4C(C(C(C=C(CC(CCCC)CC)C(CC(CCCC)CC)=C5)=C5C4=O)=O)=C(C)S3)=C6)=C6[Si]2(CC(CC)CCCC)C[C@@H](CC)CCCC)S1\n"}, {"from": "gpt", "value": " 1.7\n"}]