Using CCNc1nc(C)c2cc(CCC(=O)OCC)c(=O)n(C3CCCC3)c2n1 to produce CCNc1nc(C)c2cc(CCC(=O)O)c(=O)n(C3CCCC3)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.