Using CCCCBr, O=c1[nH]c2cccnc2n1-c1ccc2c(c1)OCO2 to produce CCCCn1c(=O)n(-c2ccc3c(c2)OCO3)c2ncccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.