Using COC(=O)CCN1C(=O)N(C2CCN(Cc3ccccc3)CC2)C(c2ccccc2)c2ccccc21 to produce O=C(O)CCN1C(=O)N(C2CCN(Cc3ccccc3)CC2)C(c2ccccc2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.