[{"from": "human", "value": "Given SMILES, write its band gap at normal measurement conditions.. ->  CC1=CC(C2=C3SC(CCCCCCCCCCCCCCCC)=C2)=C(S1)C4=C3C=C(C5=C6C(C(N(CCCCCCCCCCCC)C6=O)=O)=C(C)S5)S4\n"}, {"from": "gpt", "value": " 2.4\n"}]