Using CCNc1nc(N2CCN(Cc3ccccc3)CC2)ncc1C(=O)OCC to produce CCNc1nc(N2CCN(Cc3ccccc3)CC2)ncc1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.