Using O=CCN1CCOCC1, CCOC(=O)c1cn(CC2CCNC2)c2ccc(I)cc2c1=O to produce CCOC(=O)c1cn(CC2CCN(CCN3CCOCC3)C2)c2ccc(I)cc2c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.