Using O=C(O)Cn1c(-c2ccc(Cl)cc2)nc2cccnc21, NC1=NCCS1 to produce O=C(Cn1c(-c2ccc(Cl)cc2)nc2cccnc21)NC1=NCCS1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.