[{"from": "human", "value": "Given SMILES, write its band gap at normal measurement conditions.. ->  CC1=CC(C(OCC(CCCCCCCC)CCCCCC)=O)=C(C2=CC=C(C3=CC=C(C)S3)S2)S1\n"}, {"from": "gpt", "value": " 1.91\n"}]