Using CCCCCn1c2nc(Br)[nH]c2c(=O)n2c(CCC(=O)O)nnc12, C1COCCN1 to produce CCCCCn1c2nc(Br)[nH]c2c(=O)n2c(CCC(=O)N3CCOCC3)nnc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.