Using NC(=O)C1(Nc2ccccc2)CCN(CC2CCc3ccccc3C2=O)CC1 to produce NC(=O)C1(Nc2ccccc2)CCN(CC2CCc3ccccc3C2O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.