[{"from": "human", "value": "What is band gap of given SMILES at normal measurement conditions.? ->  CC1=CC=C(C2=C(OCCCCCCCC)C(OCCCCCCCC)=C(C3=CC=C(/C=C/C)S3)C4=NSN=C24)S1\n"}, {"from": "gpt", "value": " 1.69\n"}]