Using C1COCCN1, ClCc1nnc2n1-c1ccc(Br)cc1C(c1ccccc1Cl)=NC2 to produce Clc1ccccc1C1=NCc2nnc(CN3CCOCC3)n2-c2ccc(Br)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.