Using CC(C)(C)OC(=O)Nc1cccnc1C=O, NC1CCCc2cccnc21 to produce CC(C)(C)OC(=O)Nc1cccnc1CNC1CCCc2cccnc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.