Using COC(=O)CC1CCN(CCCN2c3ccccc3CCc3ccccc32)C1 to produce O=C(O)CC1CCN(CCCN2c3ccccc3CCc3ccccc32)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.