Using O=C(CBr)OCCNc1ccc2c(c1)COC2=C1C(=O)Nc2ccccc21, C1COCCN1 to produce O=C(CN1CCOCC1)OCCNc1ccc2c(c1)COC2=C1C(=O)Nc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.