Using O=C(Cc1ccc(Cl)c(Cl)c1)N1CCN(Cc2ccccc2)C2CCCC(N3CCCC3)C21 to produce O=C(Cc1ccc(Cl)c(Cl)c1)N1CCNC2CCCC(N3CCCC3)C21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.