[{"from": "human", "value": "Write poly dispersity index of given SMILES at normal measurement conditions.. ->  CC1=CC(N2C(CCCCCCCC)CCCCCCCC)=C(S1)C(C2=C3)=CC4=C3C5=C(N4C(CCCCCCCC)CCCCCCCC)C=C(C6=CC=C(C7=C8C(C(N7CC(CC)CCCC)=O)=C(C9=CC=C(C)S9)N(CC(CC)CCCC)C8=O)S6)S5\n"}, {"from": "gpt", "value": " 1.6\n"}]