Using O=CNc1ccc(C(=O)OC2CCN(Cc3ccccc3)CC2)cc1 to produce CNc1ccc(C(=O)OC2CCN(Cc3ccccc3)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.