Using COCCn1c2c(sc1=N)CCCC2, CC1(C)C(C(=O)O)C1(C)C to produce COCCn1c2c(sc1=NC(=O)C1C(C)(C)C1(C)C)CCCC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.