Using O=C(CCl)N(CCN1C(=O)c2ccccc2C1=O)CCN1C(=O)c2ccccc2C1=O to produce O=C1CNCCN1CCN1C(=O)c2ccccc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.