[{"from": "human", "value": "What is poly dispersity index of given SMILES at normal measurement conditions.? ->  CC1=CC(N(CCCCCCCC)C2=C3C=CC(C4=CC=C(C5=C(OCCCCCCCC)C(OCCCCCCCC)=C(C6=CC=C(C)S6)C7=C5N=C(C8=CC=CC(OCCCCCCCC)=C8)C(C9=CC(OCCCCCCCC)=CC=C9)=N7)S4)=C2)=C3C=C1\n"}, {"from": "gpt", "value": " 1.83\n"}]