Using COC(=O)C(=O)C1CCN(C2CCc3c(-c4ccccc4)[nH]c4cccc2c34)CC1 to produce O=C(CO)C1CCN(C2CCc3c(-c4ccccc4)[nH]c4cccc2c34)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.