Using CCOC(=O)c1oc2cccc(OCCCNC3CCN(Cc4ccccc4)CC3)c2c1C to produce CCOC(=O)c1oc2cccc(OCCCNC3CCNCC3)c2c1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.