[{"from": "human", "value": "Given SMILES, write its band gap at normal measurement conditions.. ->  CC1=C(CCCCCCCCCCCC)C(CCCCCCCCCCCC)=C(C2=CC(F)=C(C3=C(F)C=C(C)S3)S2)S1\n"}, {"from": "gpt", "value": " 1.45\n"}]