Using CCOCCn1c(C(=O)C2CCNCC2)nc2ccccc21, COC(=O)COCCBr to produce CCOCCn1c(C(=O)C2CCN(CCOCC(=O)OC)CC2)nc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.