[{"from": "human", "value": "Write band gap of given SMILES at room temperature and atmospheric pressure. ->  CC(S1)=CC2=C1C(OCCCCCCCCCCCC)=C(C=C(C3=CC=C(C)S3)S4)C4=C2OCCCCCCCCCCCC\n"}, {"from": "gpt", "value": " 1.8\n"}]