[{"from": "human", "value": "Given SMILES, write its band gap at normal measurement conditions.. ->  CC1=CC(C(CCCCCCCC)(CCCCCCCC)C2=CC(C3=CC=C(C4=CC=C(C5=CC=C(C)S5)C6=C4N=C(C7=C8C=C(CCCCCCCC)S7)C(C9=C8C=C(CCCCCCCC)S9)=N6)S3)=CC=C2%10)=C%10C=C1\n"}, {"from": "gpt", "value": " 1.68\n"}]