Using O=C1CNCCN1, O=C(O)Cn1nc(-c2ccccc2)c2c(Cl)c(-c3ccccc3)nnc21 to produce O=C1CN(C(=O)Cn2nc(-c3ccccc3)c3c(Cl)c(-c4ccccc4)nnc32)CCN1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.