Using CC(C)(C)OC(=O)OC(C)(C)C, CCCC1=C(C#N)C(c2ccccc2Cl)c2c(n[nH]c2O)N1 to produce CCCC1=C(C#N)C(c2ccccc2Cl)c2c(OC(=O)OC(C)(C)C)n[nH]c2N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.