Using CCO, COc1cccc(CC(N)CCC(=O)OC(C)(C)C)c1 to produce COc1cccc(CC(CCC(=O)OC(C)(C)C)NC(C)=O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.