Using CCCCOc1nc(N)c2[nH]cnc2n1, COC(=O)c1cccc(OCCBr)c1 to produce CCCCOc1nc(N)c2ncn(CCOc3cccc(C(=O)OC)c3)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.