Using COc1cc2c3c(c1)c1ccc(Br)cc1n3CCC2=O, O=Cc1cncnc1 to produce COc1cc2c(=O)c(Cc3cncnc3)cn3c4cc(Br)ccc4c(c1)c23, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.