Using O=C(Cl)c1cccnc1, Clc1cccc(Cl)c1NC1=NCCN1 to produce O=C(c1cccnc1)N1CCN=C1Nc1c(Cl)cccc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.