[{"from": "human", "value": "Write poly dispersity index of given SMILES at normal measurement conditions.. ->  CC1=CC(N(C(CCCCCCCC)CCCCCCCC)C2=C3C=CC(C4=CC=C(C5=NN=C(C6=CC=C(C)S6)C7=NON=C75)S4)=C2)=C3C=C1\n"}, {"from": "gpt", "value": " 1.9\n"}]